CHAPTEE XV 

 1860-1863 



IN the autumn he set to work to make good his 

 promise of demonstrating the existence in the simian 

 brain of the structures alleged to be exclusively 

 human, and in particular of the hippocampus minor, a 

 small eminence, shaped more or less like the sea- 

 creature of that name, in the backward prolongation 

 of the central hollow of the brain technically termed 

 the posterior cornu of the lateral ventricle. The 

 result was seen in his papers "On the Zoological 

 Relations of Man with the Lower Animals" (Nat. 

 Hist. Rev. 1861, pp. 67, 68) ; " On the Brain of Ateles 

 Paniscus," which appeared in the Proceedings of the 

 Zoological Society for 1861, and on " Nyctipithecus " 

 in 1862; while similar work was undertaken by his 

 friends Rolleston and Flower. But the brain was 

 only one point among many, as, for example, the 

 hand and the foot in man and the apes; and he 

 already had in mind the discussion of the whole 

 question comprehensively. On January 6 he writes 

 to Sir J. Hooker : 



275 



