1892.] Geology and Paleontology. 507 



and claws. "Their extremities are thin, somewhat expanded, and 

 more like those of primates than of any other group. They were 

 apparently covered by thin nails." There is no displacement but the 



Fore and Hind Fee' tfter Marsh, 



carpals and tarsals are serial and there does not seem to be even any 

 metapodial displacement. The inference is that Meniscotherium was, 

 unlike Chalicotherium, a semi-plantigrade. 



Many marked differences should also be noted. As I pointed out 

 in comparing the limbs of Chalicotherium with those of Palaeosyops, 

 the displacement in the former is exactly similar to that in the Peris- 

 sodactyla. We also note the extremely short neck of the astragalus 

 in Chalicotherium as contrasted with the Jong slender neck of BfenUeo- 

 therium. There is also a great transformation in the claws. Most of 



