130 DISTRIBUTION OF EXTINCT ANIMALS. [part ii. 



tlian wolves ; two species of GaUra, a genus now confined to the 

 Neotropical region; two bears, and an extinct genus, Ardodus ; 

 an extinct species of racoon {Procijon), and an allied extinct 

 senus, Myxophagus — show, that at a very recent period North 

 America was better supplied with Carnivora than it is now. 

 Eemains of the walrus [Triclicchus) have also been found as far 

 south as Virginia. 



Cdacca. — Three species of dolphins belonging to existing 

 genera, have been found in the Eastern States ; and two species 

 of Manahis, or sea-cow, in Florida and South Carolina. 



Ungulata. — Six extinct horses [Equus), and one Hipioarion ; 

 the living South American tapir, and a larger extinct species ; a 

 DicotyUs, or peccary, and an allied genus, Platygomis ; a species 

 of the South American llamas {Auchcnia), and one of a kind of 

 camel, Procamdus ; two extinct bisons ; a sheep, and two musk- 

 sheep {Ovibos) ; with three living and one extinct deer (Ccrvus), 

 show an important increase in its Herbivora. 



ProboscicUa. — Two elephants and two mastodons, added to this 

 remarkable assemblage of large vegetable-feeding quadrupeds. 



Rodentia. — These consist mainly of genera and species still 

 living in North America ; the only important exceptions being a 

 species of the South American capybara {Hydrochmnis) in South 

 Carolina ; and FraotJicrium, an extinct form of hare, found in a 

 bone cave in Pennsylvania. 



Udentata. — Here we meet with a w^onderful 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, Ercptodon, has been 

 found in the Mississippi Valley. 



Marsuinalia. — The living American genus of opossums, Bidel- 

 phys, has been found in deposits of this age in South Carolina. 



Remarks 07i th,c Post-Pliocene fauna of North America. — The 

 assemblage of animals proved, by these remains, to have 



