*2 MAMMALIA. 



becomes inflated when the animal is angry. It is common in the southern 

 latitudes of the Pacific Ocean, at the Terra del Fuego, New Zealand, Chili, &c. 

 It constitutes an important object of the fisheries, on account of the oil in 

 which it abounds. The 



OTARIES, Peron Seals with external ears 



Are worthy of being formed into a separate genus ; because, independently 

 of the projecting external ears, the four superior middle incisors have a double 

 cutting edge, a circumstance hitherto unknown in any animal ; the external 

 ' ones are simple and smaller, and the four inferior bifurcated. All the molars 

 are simply conical, and the toes of the fore feet almost immoveable ; the mem- 

 brane of the hind feet is lengthened out into a slip beyond each toe ; all the 

 naijs are flat and slender. 



Ph. Jubala, Gm.; Sen-Lion of Steller, Pernetty, &c. From fifteen to 

 twenty feet, and more, in length ; fawn-coloured ; the neck of the male covered 

 with hairs that are more frizzled and thickly set than those on the rest of the 

 body. It might be said to be found in all the Pacific Ocean, were it not that 

 those from the straits of Magellan seem to differ from such as are taken at the 

 Aleutian islands. 



TRICIIECUS, Linnceus*. 



The Morse resembles the Seal in its limbs, and the 

 general form of the body ; but differs widely from it 

 in the teeth and head. There are no incisors nor 

 canini in the lower jaw, which is compressed ante- 

 riorly to pass between two enormous canini or tusks, 

 which issue from the upper one, and which project 



downward, being sometimes two feet long, and of a proportionable thickness. 

 The enormous size of the alveoli, requisite for holding such tremendous canini, 

 raises up the whole front of the upper jaw, giving it the shape of a huge 

 inflated jowl, the nostrils looking upwards, and not terminating the muzzle. 

 The molars are all short obliquely truncated cylinders; there are four of 

 them on each side, above and below, but, at a particular age, two of the upper 

 ones fall out. Between the canini are two incisors, similar to the molars, 

 which most authors have not recognised as such, although they are implanted 

 in the iutm auxiliary bone. Between these again, in the young animal are two 

 more small pointed ones. 



The stomach and intestines of the Morse are very small compared to those of 

 the Seal. It appears that fucus constitutes part of its food, along with animal 

 matters. One species only is as yet ascertained, the 



Trick, rosmarus, Lin. (The Sea Cow.) It inhabits the Arctic Seas, surpasses 

 the largest ox in size, attains the length of twenty feet, and is covered with a 

 short yellowish hair. It is sought for on account of its oil and tusks ; the 

 ivory of which, although rough-grained, is employed in the arts. The skin 

 makes excellent coach braces. 



Trichechus, from rjJJ (hair), a name invented by Artedi for the Sea Cow. 



