Man. 



Oh imp ceruse c, 



Fig. 21. — Drawings of the internal casts of a Man's and 

 of a Chimpanzee's skull, of the same absolute length, and 

 placed in corresponding positions, A. Cerebrum; B. Cere- 

 bellum. The former drawing is taken from a cast in the 

 Museum of the Eoyal College of Surgeons, the latter from 

 the photograph of the cast of a Chimpanzee's skull, which 

 illustrates the paper by Mr. Marshall " On the Brain of 



