THE PRIMATES — EXCEPT MAN 113 



will consider Lichanotus laniger, the Woolly Lemur of Mada- 

 gascar (Fig. 37), the tooth forms of which may profitably be 

 compared with those of Tupaia. Regarding the habits of this 

 nocturnal animal little is known but it is probable that its 

 diet like that of its nearest relations, the Sifakas, consists of 

 leaves, fruits and flowers. The tooth formula is probably best 

 represented thus: 



2 12 3 * 



I 7, cfP^.Mf total 30 . 



J_ I — o 



Fig. 36. — Dentition of Ring-tailed Lemur (Lemur catta, Linnaeus; 9.812-3). Tins 

 animal having only recently changed its mode of life and feeding habits has not yet 

 developed any marked resulting changes in its dentition. 



The decrease in size backward of the upper molars, the con- 

 vergence backward of the limbs of the upper dental arch and 

 the extension of the palate no further than the middle of the 

 second molar all indicate specialization. So also do the rudi- 

 mentary upper incisors, the premolariform condition of the 

 upper and the incisiform appearance of the lower canine to- 

 gether with the loss of the second lower incisor. It is note- 

 worthy that in the last upper molar the metacone has sub- 

 divided to form a pseudohypocone, probably in association 



