12 



SEALS, 



with moderate roots, separated from the crown by a narrow- 

 groove, the crown compressed, divided into three elongate lobes, 

 the centre lobe much the largest, longest, and subcylindrical, 

 the anterior and posterior lobes conical ; the bases of the lobes 

 are surrounded by a sharp-edged ridge, with two small, short, 

 conical tubercles on the inner side, the larger one being at the 

 base of the separation of the hinder from the middle lobe : the 

 front grinder in each jaw is rather the thickest, with a single 

 thick conical root ; all the rest have two rather diverging roots, 

 divided nearly to the crown; the hinder tooth in each jaw is 

 rather the smallest. Symphysis of the lower jaw short. 



Fig. 3. 



Stenorhynchus Leptonyx. Skull and grinders. 



Body tapering behind. The fore limbs moderate, rather elon- 

 gate. The toes are rather larger than the wrist, and each fur- 

 nished with a small nearly terminal claw : the hind limbs are 

 rather large, of two nearly equal lobes, destitute of any claws : 

 the three middle toes small, tapering. 



The fur close-set, short, without any under-fur ; hairs flattened, 

 tapering at the tip to a point. 



In the young skull the grinders are well- developed, while the 

 cutting teeth are small and far apart : the hinder grinders have 

 four lobes, where they have only three in the adult. 



Mr. MacMurtrie, in his translations of Cuvier, erroneously adds 

 to the generic character in the text of the author, " but with 

 single roots ; " this is repeated in the reprint of the American 

 edition published by Orr, i. 98. 



Dr. Knox observes, "Teeth, -f-J-g = 32: the two lower 



