56 



THE MAMMALIAN ORDER PRIMATES 



[SECT. A 



Cheek pouches : developed in many cases. 



Ischial callosites : developed to a high degree. 



External auditory meatus : guarded by an osseous tube formed 

 by the tympanic bone. (Cf. Fig. 28.) 



Tail : non-prehensile. 



Nasal septum : narrow anteriorly, the nostrils close together in 

 consequence. 



Sternum : narrow and rod-like. 



Caecum : has no vermiform appendix. 



This family comprises the Baboons (Papio or Cynocephalus), 

 the Macaques (Macacus), the Cercopitheci, Semnopitheci, etc. 



Family IV. Simiidae 1 . (Cf. Figs. 29, 30, 31.) 



Fig. 29. Fig. 30. Fig. 31. 



Fig. 29. Adult male Gorilla (Simiidae) ; the hair has been lost owing to 

 inadequate preservation in alcohol. (Holt Donation, Mus. Anat. Cant.) 



Figs. 30 and 31. Other views of the same specimen. 



1 (Simia: exact meaning doubtful ; either " flat-nosed " or " mimic") 



