130 DISTRIBUTION OF EXTINCT ANIMALS. [PART I1. 
than wolves ; two species of Galera, a genus now confined to the 
Neotropical region; two bears, and an extinct genus, Arctodus ; 
an extinct species of racoon (Procyon), and an allied extinct 
genus, Myaophagus—show, that at a very recent period North 
America was better supplied with Carnivora than it is now. 
Remains of the walrus (Z'richechus) have also been found as far 
south as Virginia. 
Cetacea—Three species of dolphins belonging to existing 
genera, have been found inthe Eastern States ; and two species 
of Manatus, or sea-cow, in Florida and South Carolina. 
Ungulata—Six extinct horses (Zguus), and one Hipparion ; 
the living South American tapir, and a larger extinct species; a 
Dicotyles, or peccary, and an allied genus, Platygonus ; a species 
of the South American llamas (Awchenia), and one of a kind of 
camel, Procamelus ; two extinct bisons ; a sheep, and two musk- 
sheep (Ovibos) ; with three living and one extinct deer (Cervus), 
show an important increase in its Herbivora. 
Proboscidea.—T wo elephants and two mastodons, added to this 
remarkable assemblage of large vegetable-feeding quadrupeds. 
fodentia—These consist mainly of genera and species still 
living in North America; the only important exceptions being a 
species of the South American capybara (Hydrocherus) in South 
Carolina; and Praotherium, an extinct form of hare, found in a 
bone cave in Pennsylvania. 
Hdentata.—Here we meet with a wonderful assemblage, of six 
species belonging to four extinct genera, mostly of gigantic size. 
‘A species of Megatherium, three of Megalonyx, and one of 
Mylodon—huge terrestrial sloths as large as the rhinoceros 
or even as the largest elephants—ranged over the Southern 
States to Pennsylvania, the latter (Mylodon) going as far as the 
great lakes and Oregon. Another form, Hreptodon, has been 
found in the Mississippi Valley. 
Marsupialia—The living American genus of opossums, Didel- 
phys, has been found in deposits of this age in South Carolina. 
Remarks on the Post-Pliocene fauna of North America.—The 
assemblage of animals proved, by these remains, to have 
