THE CUTTLE-FISH
Is one of the most curious creatures of "the watery kingdom." It is popularly termed a fish, though it is, in fact, a worm, belonging to the order termed Mollusca, (Molluscus, soft,) from the body being of a pulpy substance and having no skeleton. It differs in many respects from other animals of its class, particularly with regard to its internal structure, the perfect formation of the viscera, eyes, and even organs of hearing. Moreover, "it has three hearts, two of which are placed at the root of the two branchiae (or gills); they receive the blood from the body, and propel it into the branchiae. The returning veins open into the middle heart, from which the aorta proceeds."[7] Of Cuttle-fish there are several species. That represented in the annexed Cut is the common or officinal Cuttle-fish, (Sepia officinalis, Lin). It consists of a soft, pulpy, body, with processes or arms, which are furnished with small holes or suckers, by means of which the animal fixes itself in the manner of cupping-glasses. These holes increase with the age of the animal; and in some species amount to upwards of one thousand. The arms are often torn or nipped off by shell or other fishes, but the animal has the power of speedily reproducing the limbs. By means of the suckers the Cuttle-fish usually affects its locomotion. "It swims at freedom in the bosom of the sea, moving by sudden and irregular jerks, the body being nearly in a perpendicular position, and the head directed downwards and backwards. Some species have a fleshy, muscular fin on each side, by aid of which they accomplish these apparently inconvenient motions; but, at least, an equal number of them are finless, and yet can swim with perhaps little less agility. Lamarck, indeed, denies this, and says that these can only trail themselves along the bottom by means of the suckers. This is probably their usual mode of proceeding; that it is not their only one, we have the positive affirmation of other observers."[8] Serviceable as these arms undoubtedly are to the Cuttle-fish, Blumenbach thinks it questionable whether they can be considered as organs of touch, in the more limited sense to which he has confined that term.[9]
The Cuttle-fish.
The jaws of the Cuttle-fish, it should be observed, are fixed in the body because there is no head to which they can be articulated. They are of horny substance, and resemble the bill of a parrot. They are in the centre of the under part of the body, surrounded by the arms. By means of these parts, the shell-fish which are taken for food, are completely triturated.
We now come to the most peculiar parts of the structure of the Cuttle-fish, viz. the ear and eye, inasmuch as it is the only animal of its class, in which any thing has hitherto been discovered, at all like an organ of hearing, or that has been shown to possess true eyes.[10] The ears consist of two oval cavities, in the cartilaginous ring, to which the large arms of the animal are affixed. In each of these is a small bag, containing a bony substance, and receiving the termination of the nerves, like those of the vestibulum (or cavity in the bone of the ear) in fishes. The nature of the eyes cannot be disputed. "They resemble, on the whole, those of red-blooded animals, particularly fishes; they are at least incomparably more like them than the eyes of any known insects; yet they are distinguished by several extraordinary peculiarities. The front of the eye-ball is covered with a loose membrane instead of a cornea; the iris is composed of a firm substance; and a process projects from the upper margin of the pupil, which gives that membrane a semilunar form."[11] The exterior coat or ball is remarkably strong, so as to seem almost calcareous, and is, when taken out, of a brilliant pearl colour; it is worn in some parts of Italy, and in the Grecian islands by way of artificial pearl in necklaces.
Next we may notice the curious provision by which the Cuttle-fish is enabled to elude the pursuit of its enemies in the "vasty deep." This consists of a black, inky fluid, (erroneously supposed to be the bile,) which is contained in a bag beneath the body. The fluid itself is thick, but miscible with water to such a degree, that a very small quantity will colour a vast bulk of water.[12] Thus, the comparatively small Cuttle-fish may darken the element about the acute eye of the whale. What omniscience is displayed in this single provision, as well as in the faculty possessed by the Cuttle-fish of reproducing its mutilated arms! All Nature beams with such beneficence, and abounds with such instances of divine love for every creature, however humble: in observing these provisions, how often are we reminded of the benefits conferred by the same omniscience upon our own species. It is thus, by the investigation of natural history, that we are led to the contemplation of the sublimest subjects; thus that man with God himself holds converse.
