566 CENOZOIC TIME — MAMMALIAN AGE. 



The North American, M. Harlani, has been found in Kentucky, in Benton co s 

 Mo., and in Oregon. 



A fourth allied genus is Scelidotherium, of which seven species have been 

 made out, — one as large as the Megalonyx, and others but little smaller. 



Of the Armadillo (or Dasypus) group the genus Glyptodon (fig. 843) 

 contained several gigantic species. These animals had a shell 

 something like a turtle. In the G. clavipes the length of the shell, 

 measuring along the curve, was five feet, and the total length of the 

 animal to the extremity of the tail, nine feet. The genus Chlamydo- 

 therium included other mail-clad species, one of which was as large 



Fig. 843. 



Glyptodon clavipes (X ab). 



as a Khkioceros ; and the genus Pachytherium, others, of the size of 

 an Ox. 



Such were the characteristic animals of Post-tertiary South Ame- 

 rica. The largest Edentates of the existing period are but three 

 or four feet in length. The Post-tertiary Megatherium probably 

 exceeded more than one-hundred fold the bulk of any living 

 Edentate. 



Australia. — In Australia the living species are almost exclusively 

 Marsupials. They were Marsupials also in the Post-tertiary period, 

 but of different species ; and, as on the other continents, the mo- 

 derns are dwarfs by the side of the ancient tribes. 



The Post-tertiary Diproiodon was as large as a Hippopotamus, and 

 somewhat similar in habits. The skull alone is three feet long. 



Viewing the globe as a whole, in this Post-tertiary period, we ob- 

 serve, — 



1. The gigantic size as well as large numbers of the species, — the 

 Elephants, Lions, Bears, and Hyenas of the Orient far larger than 

 any modern species ; so also the Horse, Elephant, Mastodon, Bea- 



