MUSEUM OF COMPARATIVE ZOOLOGY. 45 



V. Genus Arctocephalus F. Cuvier. 



6. Arctocephalus falklandicus Gray. Habitat: Coasts and islands of 

 South America, from Chili on the west and the Rio de la Plata southward 

 to the Antarctic Islands. 



? 7. Arctocephalus cinereus* Gray. Habitat: Southern shores of Aus- 

 tralia and New Zealand and the islands to the southward. 



? 8. Arctocephalus antarcticus* Gray. Habitat: Southern coast of Africa 

 and the adjoining islands. 



3. On the North Pacific Species of Otartad^e. 



Subfamily I. — TRICHOPHOCIX.E. 



Without under-fur. Size large and form robust. Ears short. Molars 

 either | = | = if, or -|-|=i°- 



Genus Eumetopias Gill. 



Eumetopias Gill, Proc. Essex Institute, V, 7, 11. July, 1866. Type "Otaria 

 californiana Lesson, = Arctocephalus monteriensis Gray." 



Molars |- ~ f = \% ; the upper hinder pair separated from the others 

 by a considerable interval ; the last only double rooted. Postorbital 

 processes quadrate. Palatine surface of the intermaxillaries flat, only 

 slightly depressed, and greatly contracted posteriorly ; the palatals mod- 

 erately produced, extending about three fourths of the distance from the 

 anterior end of the zygomatic arch to the pterygoid process ; their pos- 

 terior margin straight, or slightly or deeply emarginate ; rarely deeply so 

 in old age. 



Eumetopias hence differs from Otaria, ns restricted by Gill, in hav- 

 ing one pair less of upper molars,f a much less posterior extension of 

 the palatine bones, and in having the posterior portion of the surface 

 of the intermaxillaries less than one third, instead of more than one 

 half, the width of the anterior portion, and but slightly instead of deeply 

 depressed ; also in the form of the postorbital processes, which in 

 Eumetopias are quadrate, while in Otaria they form an obtuse, nearly 

 equilateral triangle, the apex of which points outward. In Otaria they 

 are also more produced. In the general character of the pelage, in 

 color, in proportions and size, there seems to be a close resemblance 



* Perhaps the A. cine7-etis and the A. antarcticus are to be referred to the A. falkland- 

 icus, in which case the habitat of this species is the southern seas generally, 

 t See the characters of Otaria given in the preceding " Conspectus," p. 43. 



