Fig. 275.—A, Cerebrum of a female Chimpanzee two years old. × ½. (Dorsal aspect, showing asymmetrical development.) c.c′, c.c″, Anterior and posterior central convolutions; f.i, interparietal fissure; f.l, 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. × ½. (Lateral aspect.) cb, Cerebellum; c.c′, c.c″, anterior and posterior central convolutions; fr, frontal lobe; f.s, fissura Sylvii; is, 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.)
to be distinguished from the Gorilla by the characters mentioned in the account of the latter animal. Briefly summed up they are mainly as follows:—The ears are large, and generally stand out from the head; but there are exceptions to be noted pre-
