62 PRIMEVAL MAN. 



of those functions, are greater, and involve a 

 superior number and quality of powers than 

 those resulting from the change of an 'ungu- 

 late' (hoofed, one of Cuvier s sub-class divisions) 

 into an * unguiculate,' or claw-bearing, condi- 

 tion of limb, and they demand therefore an 

 equivalent value in a zoological system." 



Accordingly, Professor Owen has attempted 

 to found a system of classification on the 

 degrees of cerebral development, as being the 

 anatomical feature which on the whole stands 

 in the most governing relation to other 

 peculiarities of structure. This proposal has 

 been vehemently contested ; but the contest 

 seems to have turned on a point not really 

 vital to the question. Objectors do but aim 

 at proving that all the leading divisions in the 



