The motions of the seal on land are constrained and peculiar. The fore feet are but little used, and the body is thrown forward in a succession of jerks produced by a contraction of the spine. Awkward as this mode of progression seems, it is, nevertheless, exceedingly rapid. The seal, however, never ventures far from the shore, and the moment it is disturbed or alarmed it plunges into the water.
The physiognomy of the animal is in perfect accord with its character, and expresses a considerable degree of intelligence combined with much mildness of disposition. The eyes are large, black, and brilliant; the nose is broad, with oblong nostrils; and there are large whiskers. The seal has no external ears, but in the auricular orifices exists a valve which can be closed at will, and protects the internal organism from the water; the nostrils possess a similar valve. The body is thickly garnished with stiff glossy hairs, very closely set against the skin, and plentifully lubricated with an oily secretion, so that the surface is always smooth, and unaffected by water. The teeth differ in different genera, but in all are specially adapted for the seizure of fish and other slippery prey, though the seals are omnivorous in their habits, and will partake both of vegetable and animal food. There are either six or four incisors in the upper, and four or two in the lower jaw; the canines are invariably large and strong; and the molars, usually five or six on either side, in each jaw, are sharp-edged or conical, and bristle with points. The seal is fond of swallowing large stones; for what purpose is not certain, but, probably, to assist digestion.
Seals live in herds, more or less numerous, along the frozen shores of the Arctic seas; and on the lonely deserted coasts they bring forth their young, over which they watch with singular affection. They swim with much rapidity, and can remain a considerable time under water. They are migratory in their habits, and at least four species visit our British waters. On the northern coasts of Greenland they are observed to take their departure in July and to return again in September. They produce two or three young at a time, and suckle them for six or seven weeks in remote caverns and sequestered recesses; after which they take to the sea. The young exhibit a remarkable degree of tractability; will recognize and obey the maternal summons; and assist each other in distress or danger. Many, if not all, of the species are polygamous, and the males frequently contend with desperate courage for the possession of a favourite female.
There is not much difference in the habits of the different genera or species of the Phocidæ; but while the great Arctic seal dives like the walrus, making a kind of semi-revolution as it goes down, the common seal (Phoca vitulina), called by the hunters the stein-cobbe, from its custom of basking on the rocks, dives by suddenly dropping under water, its nose being the last part of its body which disappears, instead of its tail.
The common seal has a very fine spotted skin, and weighs about sixty or seventy pounds. It is much fatter, in proportion to its size, than the bearded seal, and its carcass, consequently, having less specific gravity, floats much longer on the water after death.
A third kind of seal found in the Spitzbergen seas is, probably, the Phoca hispida, though the hunters know it only by the names of the “springer,” and Jan Mayen seal. In the spring months it is killed in large numbers by the whalers among the vast ice-fields which encircle the solitary rocks of Jan Mayen Island.
Mr. Lamont observes that these seals, though existing in such enormous numbers to the west, are not nearly so numerous in Spitzbergen as the great, or even as the much less abundant common seal. They are gregarious, which neither of the other varieties are, and generally consort in bands of fifty to five hundred. They are extremely difficult to kill, as during the summer months they very seldom go upon the ice; they seem much less curious than the other seals, and go at such a rapid pace through the water as to defy pursuit from a boat. On coming up to breathe, these seals do not, like their congeners, take a deliberate breath and a leisurely survey, but the whole troop make a sort of simultaneous flying leap through the air like a shoal of porpoises, as they go along, and reappear again at an incredible distance from their preceding breathing-place. Hence the name of “springers” given to them by the whalers.
THE COMMON SEAL.
The Jan Mayen seal weighs from 200 to 300 lbs., and is described as the fattest and most buoyant of the Arctic mammals.