The _Amphibia_, _Fishes_, _Animalcules_, etc., must conclude our sketch of the zoology of the Arctic regions. In the class _Amphibia_, the most notable personage is the Greenland shark, _Squalus borealis_. It has not, I believe, been described. The ventral fins are separate. It is without anal fin, but has the temporal opening, and it belongs, therefore, to the third division of the genus. The spiracles on the neck are five in number on each side. The colour is cinereous grey. The eyes are the most extraordinary part of the animal. The pupil is emerald green, the rest of the eye blue. To the posterior edge of the pupil is attached a white vermiform substance, one or two inches in length. Each extremity of it consists of two filaments, but the central part is single. The sailors imagine this shark is blind, because it pays not the least attention to the presence of a man, and is, indeed, so apparently stupid, that it never draws back when a blow is aimed at it with a knife or a lance. It is twelve or fourteen feet in length, and six or eight feet in circumference, and in general form very much resembles the dog-fish. It is one of the foes of the whale. It bites and annoys it when living, and feeds on it when dead. With its teeth, which are serrated in one jaw, and lancet-shaped and denticulated in the other, it scoops out of the body of the whale pieces as large as a person’s head, and continues scooping and gorging till its belly is filled. It is so insensible to pain that, though run through the body with a knife, it will return to its food, and for some hours after its heart is taken out, or its body cut in pieces, they will continue to show signs of life. It does not, so far as I am aware, attack the fishers. In the class _Pisces_, _Gadus carbonarius_, the coal-fish, was procured by captain Phipps, as also of the former class, _Cyclopterus liparis_, during his stay in the vicinity of Spitzbergen. _Mullus barbatus_ was taken out of the mouth of a seal by a seaman, near Spitzbergen. It was boiled by our officers, and proved an excellent dish. In the class _Articulata_ are one or two species of _gammarus_. The _G. arcticus_ of Leach, the actions of which suggest as a familiar name, the mountebank shrimp. There are also various crabs, and the _Oniscus ceti_ of Linnæus, or whale’s louse. This little animal is about half an inch in diameter, and firmly fixes itself by hooked claws on the skin of the mysticetus. It is found under the fin, and wherever the skin is tender, and it is not likely to be dislodged. A similar animal, though smaller, is found on the body of the narwal.