STREPSIRHINA. 417 



the snout. The incisor teeth are generally much modified, 



o o 



and are in number '- as a rule ; the lower incisors are 



3—3 



produced and slantino- ; the premolars are ' or ^ , 



3_3 2—2 



and the molars are tuberculate (fig. 689). The second digit 

 of the hind-limb has a claw, and both fore and hind ffeet have 

 five toes each, all the 

 thumbs being gene- 

 rally opposable. In 

 the true Lemurs, all 

 the digits, except the 

 second toe of the hind- 

 feet, are furnished with 

 nails. 



This section is often 



p n 1 1 pri til n 1- nf t"h P Pi-n ^'°- ^^^- ~^''^'' "'^"^ "^ ^^'** '^^''^ ""^ '"" ^''''°S Lemuroid 



Uciueu LUdUUi bue ^/y- (Stciwps tardigradus). (After Giebel). 



simice, and it includes 



several families, of which the Aye -ayes, Loris, and true 



Lemurs are the most important. 



Milne-Edwards and Gervais, from an examination of the 

 placentation of the Lemuroids and of their cerebral char- 

 acters, conclude that the group should be raised to the rank 

 of a distinct order intermediate between the Carnivora and 

 the Quadrumana. 



Until quite recently little or nothing could be said to be 

 known as to the existence in past time of Lemuroid Quad- 

 rumana. Now, on the other hand, a large number of fossil 

 Lemuroids are known, commencing in the Eocene Tertiary ; 

 though as regards most of these the available information 

 is still imperfect. In the European area the earliest 

 remains of Strepsirhine Monkeys have been detected in the 

 Eocene, the Ccenopithecus lemuroidcs of Elitimeyer seeming 

 to be a true Lemuroid. The genera named Adapis and 

 Aphelothermm, of the French Eocene — the former originally 

 referred by Cuvier to the Ungulates — would also appear to 

 be Lemuroids. The Fala^olemur and Necrolemur of the 

 Miocene deposits of France are likewise considered to be 



VOL. II. 2 D 



