CHAP. IV] THE GENERAL ANATOMY OF GORILLA 



211 



mass and function. These two principles are closely allied, and 

 the mcde of adaptation of the Primate type to an erect position, and 



Fig. 143. 



Sperm-cells of the Gorilla (No. 7) and other apes. For references see 

 Fig. 51. (After Retzius, op. cit.) 



the characters attendant on the greater cerebral development will 

 be considered in some of the ensuing chapters. 



14—2 



