Chambers's Edinburgh Journal, No. 423

It is evident that the motive apparatus in this section of the Acalephæ is but a feeble one. It only avails in calm weather. When the sea is agitated, the jelly-fish is driven helplessly along. It cannot choose its path. As its food, however, is everywhere abundant around it, and it has no business that should lead it in one direction more than another, there is no great hardship in this.

In this section are included some of the most beautiful, as well as common of the tribe. The forms of the umbrella are often most lovely, and present an astonishing variety. As an example of the beauty which they sometimes display, we may refer to a species which resembles an exquisitely formed glass-shade, ornamented with a waved and tinted fringe. The most perfect grace of form, the transparency of the crystal, and colour as delicate as that of the flower, combine to render this frail being one of the loveliest of living things.

In another section, locomotion is effected by a modification of ciliary apparatus. We have a familiar example in the Beroe of our own seas, a most attractive little being, and a prime favourite with naturalists, who have described its habits and celebrated its beauty with enthusiasm. We shall not soon forget the delight with which we first made acquaintance with this graceful little rover. While rambling along the shore in quest of marine animals, our attention was arrested by a drop of the clearest jelly, as it seemed to be, lying on a mass of rock, from which the tide had but just receded. On transferring it to a phial of sea-water, its true nature was at once revealed to us. A globular body floated gracefully in the vessel, scarcely less transparent than the fluid which filled it. Presently it began to move up and down within its prison-house, and the paddles by means of which the beroe dances along its ocean-path were distinctly visible. These paddles are nothing more or less than cilia of a peculiar kind, ranged in eight bands upon the surface of the body. They are set in motion at the will of the animal, and their incessant strokes propel it swiftly through the water. By stopping some of its paddles, and keeping others in play, the beroe can change its course at pleasure, and so wander 'at its own sweet will,' through the trackless waste. Beauty waits upon the course of this little crystal globe. The grace and sprightliness of its movements must strike the commonest observer. As the sunlight falls upon its cilia, they are 'tinted with the most lovely iridescent colours;' and at night they flash forth phosphoric light, as though the little creature were giving a saucy challenge to the stars.

The beroe is a most active being, its habits conforming to the organisation with which it is endowed. Such an array of paddles prophesies of a mercurial temperament and an energetic character. It can, however, anchor itself and lie by when occasion offers. It is provided with two long cables, prettily set with spiral filaments or tendrils, by means of which it can make fast to any point. When not in use, it can retract them, and stow them away in two sacs or pouches within the body, where they may be seen coiled up, through the transparent walls. The mouth is a simple opening at one pole of the globular body. No arms are needed. The beroe is spared the labour and uncertainty of the chase. As it dances gaily along, streams of water, bearing nutritive particles, pass through the orifice into its stomach.

In this creature, as in many of the lower animals, there is a remarkable power of retaining vitality after the most serious injuries; nay, in portions actually severed from the body, it will continue for some time. Mr Patterson, in his excellent Introduction to Zoology, mentions that on one occasion he divided a fragment of the body of a beroe, lately taken from the shore and shattered by a storm, 'into portions so minute that one piece of skin had but two cilia attached to it, yet the vibration of these organs continued for nearly a couple of days afterwards!' But we must leave the beroe, charmer though it be.

Another member of this section—the Ciliograde acalephæ, as they are called—is the Girdle of Venus, which resembles a ribbon in form, and is sometimes five or six feet in length, covered with cilia, and brilliantly phosphorescent. This must be one of the most beautiful of the fireworks of the ocean.

The jelly-fishes of another section are furnished with one or more air-bags, which assist them in swimming, and hence bear the name of hydrostatic acalephæ. In the Portuguese man-of-war (Physalia), the bag is large, and floats conspicuously on the surface of the water. From the top of it rises a purple crest, which acts as a sail, and by its aid the little voyager scuds gaily before the wind. But should danger threaten—should some hungry, piratical monster in quest of a dinner heave in sight, or the blast grow furious—the float is at once compressed, through two minute orifices at the extremities a portion of the air escapes, and down goes the little craft to the tranquil depths, leaving the storm or the pirate behind. In one species (Cuvieria), the floats are numerous and prettily ranged round the margin of the body. Resting on these, the creature casts about its long fishing-lines, and arrests the passing prey.

One more section remains to be noticed. The jelly-fishes which belong to it have a rudimentary skeleton—a plate which supports the soft, circular body. From the lower part of the body hang numerous tentacles (cirri), amidst which the mouth is placed. Probably these multitudinous arms assist in locomotion; and, hence the name of the family, Cirrigrades. Amongst the creatures of this division we meet with some very interesting locomotive apparatus. There are some of them by no means obliged to trust to their oars alone—they have also sails. The Velella, large fleets of which visit our seas at times, has a plate (the mast) rising from its bluish disk or deck, covered with a delicate membrane (the sail) of snowy whiteness, by means of which it traverses the ocean. This sail, it has been noticed, 'is set at the same angle as the lateen-sail' of the Malays. We cannot doubt that it is admirably suited to its purpose, and the Malays may be proud of having nature as a voucher for their contrivance.

We find in another species a still more perfect rigging. In it (Rataria) the crest is supplied with muscular bands, by means of which the sail can be lowered or raised at pleasure. These adaptations of structure are full of interest. Nothing can be more admirable than the sailing-gear of these little creatures. They have to traverse the surface of the ocean amidst all diversities of weather. Paddles alone would not suffice for them. They must be enabled to take advantage of the winds. Sails, therefore, are added, and the mightiest agents in nature are commissioned to speed the little voyagers on their way.

We have already mentioned that some of the jelly-fishes possess the power of stinging. Only a few of the larger species, however, seem to be thus endowed; and the name sea-nettle is by no means applicable to the class as a whole. The poisonous fluid which produces the irritating effect on the skin, and no doubt paralyses the creatures upon which the jelly-fish feeds, is secreted by the arms. By means of its poison-bearing tentacles, the soft, gelatinous medusa is more than a match for the armed crustacean and the scale-clad fish. We take from Professor Forbes the following graphic description of one of the stinging species:—'The Cyanæa capillata of our seas is a most formidable creature, and the terror of tender-skinned bathers. With its broad, tawny, festooned, and scalloped disk, often a full foot or more across, it flaps its way through the yielding waters, and drags after it a long train of ribbon-like arms, and seemingly interminable tails, marking its course when its body is far away from us. Once tangled in its trailing "hair," the unfortunate who has recklessly ventured across the graceful monster's path too soon writhes in prickly torture. Every struggle but binds the poisonous threads more firmly round his body, and then there is no escape; for when the winder of the fatal net finds his course impeded by the terrified human wrestling in its coils, he, seeking no contest with the mightier biped, casts loose his envenomed arms, and swims away. The amputated weapons severed from their parent body vent vengeance on the cause of their destruction, and sting as fiercely as if their original proprietor itself gave the word of attack.'

We now approach the most extraordinary portion of the history of these creatures. Recent investigations have brought to light the most interesting facts respecting their reproduction and development. It is now known that the young jelly-fish passes through a series of transformations before reaching its perfect state.

At certain seasons, eggs are produced within the body of the parent in appropriate ovaries, where they are retained for a time. They are then transferred to a kind of marsupial pouch, analogous to that of the kangaroo, where their development proceeds. After passing through certain changes here, the egg issues from the maternal pouch as an oval body, clothed with cilia—an animalcule in external aspect, and as unlike its parent as can well be imagined. For awhile the little creature dances freely through the water, and leads a gay, roving life; but at last it prepares to 'settle;' selects a fitting locality; applies one extremity of its body to the surface of stone or weed, and becomes attached. And now another change passes over it. The cilia, no longer needed, disappear. A mouth is developed at the upper extremity of the body, furnished with a number of arms. Gradually this number increases, and the jelly-fish now appears in the disguise of a polype, which feeds voraciously on the members of the class from which it has itself so lately emerged. At this point there is a halt. The medusa remains in its polype state for some months. At the expiration of this term, a strange alteration in its appearance begins to take place. Rings are formed round its body, from ten to fifteen in number. These gradually deepen, until at length it is literally cut up into a number of segments, which rest one upon the other—their upper margins becoming elevated, and divided into eight lobes. It is, in fact, a pile of cup-shaped pieces, very loosely connected together. A little later, these pieces free themselves successively, and the sedate polype disappears in a company of sprightly young medusæ. These beings, indeed, still differ in some respects from the adult animal; but the differences gradually vanish, and we have the perfect jelly-fish as the final result of this extraordinary series of transformations.

Similar observations have been made respecting other tribes amongst the lower animals, and some interesting generalisations have been founded upon them, into which, however, it is not our present purpose to enter.

The Acalephæ are the principal agents concerned in the production of the beautiful phenomena of phosphorescence. The minute species—mere gelatinous specks—swarm at times by countless myriads in the waters of the ocean, and make its surface glow with 'vitalised fire.' The waves, as they curl and break, sparkle and flash forth light, and the track of the moving ship is marked by a lustrous line. 'In the torrid zones between the tropics,' says Humboldt, 'the ocean simultaneously develops light over a space of many thousand square miles. Here the magical effect of light is owing to the forces of organic nature. Foaming with light, the eddying waves flash in phosphorent sparks over the wide expanse of waters, where every scintillation is the vital manifestation of an invisible animal world.' Beneath the surface larger forms are seen, brilliantly illuminated, and lighting up the mystic depths of the sea. Fiery balls and flaming ribbons shoot past; and submarine moons shine with a soft and steady light amidst the crowds of meteors. 'While sailing a little south of the Plata on one very dark night,' says Mr Darwin, 'the sea presented a wonderful and most beautiful spectacle. There was a fresh breeze; and every part of the surface, which during the day is seen as foam, now glowed with a pale light. The vessel drove before her bows two billows of liquid phosphorus, and in her wake she was followed by a milky train. As far as the eye reached, the crest of every wave was bright; and the sky above the, horizon, from the reflected glare of these livid flames, was not so utterly obscure as over the vault of the heavens.' Even in our own seas very beautiful displays of phosphorescence may be witnessed. On fine summer nights, a soft, tender light plays round the boat as it moves onward, and the oars drop liquid fire. For how much of beauty are we indebted to these living specks of jelly?

Of the extreme minuteness of some of the species, an idea may be formed from the fact, that 110,000 might be contained in a cubic foot of water. We can say nothing with certainty as to the cause of the phosphorescence of the medusæ, and shall not trouble our readers with mere speculations.

The jelly-fishes furnish us with a striking illustration of the profusion of life in the ocean. Provision has indeed been made for securing in all the realms of our globe the largest possible amount of sentient being, and consequently of happiness. And to each tribe a definite part is assigned—a special mission is intrusted. None can be spared from the economy of nature. The shoals of microscopic medusæ store up in their own tissues the minute portions of nutritious matter diffused through the waters, and supply food for the support of higher organisms. All the tribes of animated beings are dependent one upon another. That the greatest may enjoy its existence and fulfil its work, the least must hold its place and discharge its function. They co-operate unconsciously to secure the unity and harmony of a system which is designed to promote alike the interests of each and all of them.

STEEPLE-JACK'S SECRET

You want me to tell you how it comes to pass that I am able to glide up a steeple like a spider, get astride upon the cross, and pull off my cap to the crowd below, like a gentleman on horseback saluting his acquaintances.2 You want me to explain on what principle, as you call it, I do this. Well: principle, I suppose, means the rule or law by which a man does what he ought to do; and if so, it is a very good word to use. I will oblige you by explaining my principle, for I am as affable as any man that creeps to his dying day upon the surface of the earth; and I will tell you how it chanced that I found it out: at least I will try, for I am no scholar; and if you wish to understand me, you must have your ears open, and catch a meaning when you can. And this will do you good, whether you make anything out or not. I know fellows that go to the lectures, and come back as empty as they went. But what of that? They think they understand, and thought breeds thought; and when a man's mind is fairly astir, it is odds but something good turns up.

You must know, then, I began the world as a sailor; and I marvel to this day how I ever became anything else. Sailors are the stupidest set in creation. They are mere animals, except in the gift of speech; good, honest, docile animals, perhaps, but dull and narrow. They go round the small circle of their duties like a blind horse in a mill. Their faculties are rocked by the waves and lulled by the winds; and when they come ashore, they can see and understand nothing for the swimming of their heads. Drink makes them feel as if at sea again; and when the tankard is out, they return on board, and exchange one state of stupefaction for another. Well, I was a sailor, and the dullest of the tribe. No wonder, for I was at it when a young boy. I was never startled by the sights or sounds of the sea. The moaning of the wind, the rush of the waves, the silence of the calm, were parts of my own existence; and in the wildest storm, my mind never took a wider tack than just to think what the poor devils on shore would do now.

I was a handy lad, however. I could go aloft with any man on board, and never troubled the shrouds in coming down when a rope was within springing distance. But this was instinct or habit: thought was not concerned in it—I had not found the principle. One day, it blew what sailors call great guns; our bulwarks were stove in pieces, and the sea swept the deck, crashing and roaring like a whole herd of tigers. There was something to do at the mast-head; and when the order came through the speaking-trumpet, seeing the men hesitate, I jumped upon the shrouds without thinking twice. But at that moment the ship gave a lurch, and, holding on like grim death, I was buried deep in the waves. Although still clutching the ropes, I had at first an idea that they had parted, and that we were on our way to the bottom together. This could not have lasted above a minute or so; but it seemed to me like a year. I heard every voice that had ever sounded in my ear since childhood; I saw every apparition that had ever glided before my fancy: the Sea-Serpent twisted his folds round my neck, and the keel of the Flying Dutchman grated along my back. When the vessel rose at last, and I rose with her, the waters gurgling in my throat and hissing in my ears, I did not attempt to spring up the shrouds. I looked round in horror for the objects of my excited thoughts; and as I saw another enormous wave advancing till it overhung me, instead of getting out of its reach, which I could easily have done, I kept staring at it as it broke into what seemed innumerable goblin faces and yelling voices over my head. I was down again. My leading thought now was that I would strike out and swim for my life. But when I had just made up my mind to this—which the sailors would have called being washed away—I rose once more to the surface—and struck up like a good one! I was at the cross-trees in a breath, and once in safety there, I looked back both with shame and indignation.

When my job was finished, I went higher up in a sort of dogged humour. I went higher, and higher, and higher than I ever ventured before, till I felt the mast bending and quivering in the gale like the point of a fishing-rod; and then I looked down upon the sea. And what, think you, I found there? Why, the goblin faces were small white specks of foam that I could hardly see; and their yelling voices were a smooth, round, swelling tone, that rolled like music through the rigging. The mountain-waves were like a flock of sheep in a meadow, running and gamboling, and lying down and rising up; and in the expanse beyond the neighbourhood of the ship, they were all lying down together, or wandering like shadows over a smooth surface. I felt grand then, I assure you. I looked down, and around, and above, till thoughts that were not the instincts of an animal, came dancing up in my mind, like bubbles upon the face of the sea. And as I returned slowly to the deck, these thoughts grew and multiplied, and began to arrange themselves into a form which I am not scholar enough to describe. But through this new medium, I saw things as they are, not as habit and prejudice make them. I did not fear the waves, and I did not despise them. I humoured the sea as I got down towards the bulwarks, which were still buried every now and then; and so I reached my quarters in safety.

And what has all this to do with it? I will tell you. With the means of doing a thing, nothing is difficult, if you only understand thoroughly the nature of the thing. The obstacles that commonly deter you are not in the thing, but in you; and until you understand this, you will keep gaping and shrinking, and saying, 'It is impossible.' Some folk, when looking out of a three or four storey window, feel as if they were going to fall. This is their own fault, not the fault of the window, for that is just like a parlour window, where they have no sensation of the sort. A man sits peaceably enough on the top of a tall, three-legged stool, and could hitch himself round and round, and then get up and stand upon it erect for half a day, without any risk of falling. Now, a steeple is much more securely fixed than a stool; its top is as broad as a table; and there is nothing to prevent anybody from standing upon it as long as he pleases, if he only will not think he is going to fall. You go up half-a-dozen steps of a ladder without fear, and then persuade yourself you can go no farther; but there is nothing more dangerous in the next half-dozen, so far as they are themselves concerned; nor in the next hundred, nor the next thousand, for that matter. My secret consists in my knowing all this, although I feel that I have only described when, not how the knowledge came. Perhaps you, who are book-learned, may be able to make it out, and shew how it is that, when anything occurs to awaken the mind, and enable one to work from knowledge, not habit, he is ten times the man he was. Without this, I should have climbed a mast all my life; but with it, I took to leaping up steeples by means of a kite, in a way that makes many ignorant persons report that I manage it by holding on by the tail.

But a man who goes up a steeple must take care how he behaves, for the eyes of the world are upon him. He is not lost in a crowd, where he is seen only by his next neighbours. That man must pull off his cap and be affable; but he must not do even that to extravagance. When the Queen was passing up the Clyde, an American seaman got on the topgallant, and stood on his head. What was that for, I should be glad to know? Suppose her Majesty was coming along Princes Street, just to take the air like a lady, and look into the shop-windows, and I was to go right up to her, and stand on my head—what would she say? I surmise, that she would turn round to her Lord Gold Stick, and order him to give me a knock on the shins. I know she would, for she is a regular trump, and knows how people in every station should behave. I am ashamed of that American: he is a Yankee Noodle!

It may be said, that the Queen has the same advantage as myself—that she is up the steeple; but so is every ordinary bricklayer or emperor. The thing is to be able to look and understand when you are up. I once saw a curious sight as I sat with the swallows flying far under my feet. The people did not wander about the street here and there as usual, but hundreds after hundreds of small objects came on in regular array. Then I could see long lines of Lilliputian soldiers marching in the procession, with their tiny bayonets glancing in the sun; and every now and then came up a soft swell of music, feeble but sweet. 'What is all this about?' thought I. 'Are they going to set one of these little creatures over them for a bailie or a king?' And one did march in the middle with a small space round him; 'but perhaps,' thought I again, 'he is only a trumpeter.' Howbeit, the procession at last halted, and gathered, and closed, and stood still for a time; and there was another small swell of the instruments, with a feeble shout from the throng, and then they all stirred, and broke, and dispersed, and disappeared. This was just like the view from the mast-head: it made me feel grand. But when I came down, I had not replaced one prejudice with another. I did not despise the creatures I came among; for they were then of the same size as myself. I pulled off my cap to them, and was affable; only it did give me a queer thought—not a merry one—when I heard that the official they had made that day, on going home to his house, out of the grandeur and the din, was heard to commune with himself, saying: 'And me but a mortal man after all!'

Poetry? No, sirs, I have learned no poetry. I had poetry enough of my own without learning it, and so has everybody else. I once knew a fellow who wrote very good poetry; but few of us understood it. That man lost his labour. It is nature that makes poetry; the poet has merely found out the art of stirring it in the hearts of men, where it lies ready-made, like the perfume of a flower. A poet who is not understood only makes a noise; and he is the greatest poet who makes the greatest number of human hearts to leap and tingle. But the fellow I mean piqued himself on not being understood. Like the Yankee Noodle, he cut capers that had no intelligible meaning in them, just to make people stare. As for my own share of poetry, I will tell you when I feel it stirring most. You must know that in the view from a steeple the form of objects is changed only in one direction—that is downwards. The small houses, the narrow streets, the little creatures creeping along them, and the feeble sounds they send up, make me feel grand. But when I turn my eyes to the heavens, I see no shadow of change. The clouds look awful, as if despising my poor attempt at approach; and they glide, and break, and fade, and build themselves up again—all in deep silence—in a way that makes me feel mean. Now this mean feeling is real poetry. The meaner I feel, the grander are they; and when I look long at them, and think long, and then begin to descend to the earth, to mingle with the little creatures who are my fellows, I tremble—but not with fear.