CHAP. XVII.] 



MAMMALIA. 



203 



Southern Hemisphere ; ZalopJms (2 species), North Pacific, from 

 California to Japan, and the shores of Australia and New Zea- 

 land ; Eumetopias (1 species), Behring's Straits and California. 



Fossil Otariidce. Eemains supposed to belong to this family 

 have been found in the Miocene of France. 



FAMILY 34 TEICHECHID^E. (1 Genus, 1 Species.) 

 GENERAL DISTRIBUTION. 



The Morse, or Walrus (Trichecus rosmarus], which alone 

 constitutes this family, is a characteristic animal of the North 

 Polar regions, hardly passing south of the Arctic circle except on 

 the east and west coasts of North America, where it sometimes 

 reaches Lat. 60. It is most abundant on the shores of Spitz- 

 bergen, but is not found on the northern shores of Asia between 

 Long. 80 and 160 E., or on the north shores of America from 

 100 to 150 west. 



Its remains have been found fossil in Europe as far south as 

 France, and in America as far as Virginia ; but the small frag- 

 ments discovered may render the identification uncertain. 



FAMILY 35. PHOCIILE. (13 Genera, 21 Species.) 

 GENERAL DISTRIBUTION. 



The earless or true Seals are pretty equally divided between 

 the Northern and Southern Hemispheres, frequenting almost ex- 

 clusively the temperate and cold regions, except two species 

 said to occur among the West Indian islands. The genus 

 Phoca and its close allies, as well as Halichosrus and Pelagius, are 



