SIMIID^E 



737 



the arms reach only a short distance below the knee, in which 

 respect the Chimpanzee is more human-like than any of the other 

 Apes. The face is furnished with distinct whiskers, eyebrows, and 

 eyelashes. The pollex reaches nearly or quite to the base of the 

 first phalange of the index finger, and the hallux to the base of 

 the second phalange of the corresponding digit of the foot. The 

 laryngeal sacs are as largely developed as in the Gorilla. 



Although the skull of the Chimpanzee has distinct superciliary 



Fio. 357. The Chimpanzee (Anthropopithecus troglodytes). From Mr. Wolfs drawing of a young 

 individual in the Zoological Society's Gardens. 



ridges, yet the high bony crests of the calvarium of the male 

 Gorilla are wanting, and the whole coronal region of the skull is 

 more rounded and far less rugged. 



The canine teeth of the male Chimpanzee are relatively much 

 smaller than in the Gorilla and Orang. The upper molars are 

 characterised by the third one being smaller than either of the 

 other two, as well as by the presence of an indistinct cingulum on 

 their inner surfaces. The upper premolars differ from those of the 

 other genera of the family by the shortness of their antero-posterior 



47 



