| | | 30. Callorhinus | 1 | Behring's Straits | Kamschatka 31. Zalophus | 1 | S. California to | Japan | | N. Pacific | _Eumetopias_ | 1 | California to | | | Behring's Straits | | | | TRICHECHIDÆ. | | | 32. Trichechus | 1 | Arctic Ocean to 66° N.| Palæarctic | | Lat. in N. America | PHOCIDÆ. | | | 33. Callocephalus | 1 | Greenland | Palæarctic 34. Pagomys | 1 | N. Atlantic and | Japan | | N. Pacific | 35. Pagophilus | 1 | N. Atlantic and | Palæarctic | | N. Pacific | 36. _Halicyon_ | 1 | N. W. coast of America| 37. Phoca | 1 | Northern Coast | Palæarctic 38. Halichoerus | 1 | Greenland | Palæarctic 39. Morunga | 1 | California | S. temperate shores 40. Cystophora | | Greenland | N. Atlantic | | | UNGULATA. | | | SUIDÆ. | | | 41. Dicotyles | 1 | Texas to Red River, | Neotropical | | Arkansas | | | | CERVIDÆ. | | | 42. Alces | 1 | N. E. United States & | N. Palæarctic | | Canada | 43. Rangifer | 2 | Maine to Arctic Ocean | Arctic zone | | & Greenl. | 44. Cervus | 6 | N. America to 57° N. | Neotr., Palæarc., | | Lat. | Orien. | | | BOVIDÆ. | | | 45. Bison | 1 | Between Missouri & | E. Europe | | Rocky Mtns. | 46. _Antilocapra_ | 1 | Central plains from | | | Rio Grande to | | | British Columbia | 47. _Aplocerus_ | 1 | Northern Rocky | | | Mountains | 48. Capra | 1 | Upper Missouri and | Palæarctic | | Rocky Mountains | | | northwards | 49. _Ovibos_ | 1 | Arctic America and | | | Greenland | | | | RODENTIA. | | | MURIDÆ. | | | 50. Reithrodon | 5 | N. America to Lat.