514 ANIMAL PHYSIOLOGY. 
Fia. 371.—Brain of chimpanzee, part of right hemisphere being cut away so as to expose 
lateral ventricle (Vogt. after Marshall). 
Fie. 372.—Brain of human idiot (after Vogt and Theile). This brain, one of the smallest ever 
examined, weighed only 300 grammes (10°6 0z). The resemblance between these twor 
brains is striking. Lettering in each figure alike. cs, corpus striatum ; ca, hippocampus 
major in descending cornu ; km, hippocampus minor in posterior cornu ; L, great longi- 
tudinal fissure; F, frontal, P, parietal, O, occipital lobes; R, fissure of‘ Rolando; V, 
external perpendicular. fissure ; K, operculum ; A, 4, ascending frontal; B, B, ascending 
parietal convolution. : 
