THE ENDRINAS, 9 1 



on the outside, are moderately long and buried in the fur, but 

 are less movable at will than is the case with the Galagos. 

 Their fore-limbs are much shorter than the hind ones. The 

 arms, which are united to the body by a parachute-like fold of 

 integument, have long, narrow, and strong hands, of which 

 the thumb is short, set far back, and but little opposable. The 

 rest of the fingers, except the index, which is short, are long 

 and slender, and terminate in a round disc. The feet are elon- 

 gate, and the great toe, which is freely opposable to the other 

 toes, is very large and broad, being, indeed, nearly as wide 

 as the rest of the digits together; the remaining toes are 

 united by a membrane as far as the second segment. The 

 females have the mammae situated on the breast. 



In the skull the facial region is relatively small, and the 

 cranial region relatively large. The external nostrils communi- 

 cate with a cavity on the underlying bone ; the pre-maxillary 

 bones are deeply excavated in front, and the anterior perfora- 

 tions in the bony palate, behind the incisor teeth, are large. 

 The lower jaw has its angle large, produced backwards, the line 

 of union of its two halves being long, and its lateral move- 

 ments very limited. In regard to their dentition, the number of 

 the milk-teeth in the young individual is greater than that of 

 the permanent set in the adult, the formula of the former being 

 If, C|, P| [Mf ], while that of the latter is If, Q, Pf , M|, 

 the lower canine and one lower pre-molar having disappeared. 

 In the upper jaw the incisors are very small, the outer one stand- 

 ing behind the inner one, with a space between the former and 

 the canine ; the canines are long, curved behind, and set close 

 up to the anterior pre-molar. The pre-molars are longer than 

 they are broad, laterally compressed, and present to the outside 

 one main triangular cusp with a small accessory cusp on each 



