XVII BRAIN OF CHIMPANZEE 57a 
to be distinguished from the Gorilla by the characters mentioned 
in the account of the latter animal. Briefly summed up they 
ES: 
tp. 
Fig. 275.—A, Cerebrum of a female Chimpanzee two years old. x4. (Dorsal aspect, 
showing asymmetrical development.) c.c’, c.c’, Anterior and posterior central con- 
volutions ; /.7, interparietal fissure; /./, the longitudinal fissure ; f.po, parieto- 
occipital fissure ; fr, frontal lobes ; oc, occipital lobes ; s.c, sulcus centralis. B, 
Brain of a female Chimpanzee two years old. x4. (Lateral aspect.) cb, Cere- 
bellum ; ¢.c’, c.c’, anterior and posterior central convolutions ; 7, frontal lobe ; js, 
fissura Sylvii; zs, island of Reil; md, medulla oblongata ; oc, occipital lobe ; pa, 
parietal lobe; s.c, sulcus centralis; tp, temporal lobe. (From Wiedersheim’s 
Structure of Man.) 
are mainly as follows :—The ears are large, and generally stand 
out from the head; but there are exceptions to be noted pre- 
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