MARINE MAMMALS 



199 



the Albatrosses (Diomedea), which is essentially a group 

 of the Antarctic Seas, are represented by three distinct 

 species in the North Pacific. 



The second family of the marine Carnivora, on the 

 other hand, the Walruses (Trichechidte), are entirely Arctic 

 in their distribution — one species (Trichechus rosmarus) 



Fig. 41. — The Patagonian Sea-lion. 



(Otaria jubata.) 



[P. Z. S. 1S66, p. 80.] 



(see Fig. 42, p. 200) being peculiar to the North Atlantic, 

 a second nearly allied species (T. obesus) takes its place 

 in the Northern Pacific. 



The third family of Pinnipeds is more numerous and 

 varied, both in genera and species, than the two preceding, 

 and has a more extended range. The Seals, Phocida, 



