Till-: MAMMALIA. 



On the otlu-r hand, the live-toed limb extends from 

 the salamander to man. Together with thi- 



have the most 

 various kinds of 

 disappearances 

 and coalescings 

 till we reach the 

 one-toed foot of 

 the horse, and 

 find, in fact, 

 that a diminu- 

 tion in the num- 

 ber of fingers 

 and toes ta ; 

 place ; never do 

 we meet with 

 a restoration 

 after the de- 

 crease, and 

 never with an 

 addition to the 

 number of toes. 

 In order to 



illustrate tin fundamental form, which we shall 

 follow in it- DQpgJ varied and interesting chai 

 let r, '/ ri'iht In ml <>f n j'rt'*h-icatcr 



1. Bight hand of a river tortoise. 

 Nat. size. 



