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Show 1903.] BRAINS OP MONKEYS. 19 note) that this state of affairs is not universal in Cynocephalus; but it has still got to be proved that it is universal in Cyno-pithecus. Text-fig. 7.' Lateral view of brain of Cynopithecus niger. h, inferior temporal fissure; cn, collateral; P, parallel. Other letters as in text-figs. 2, 3. Text-fig. 8. Longitudinal median section of brain of Cynopithecus niger. Letters as in text-fig. 4. The collateral sulcus, as compared with that of the Macaques and Cercopitheci, is particularly well developed. It has, so to speak, taken advantage of the feeble development of the inferior occipital to thrust itself forward upon the occipital lobe, where it is plainly visible when the brain is viewed from behind; it is also visible where it curves upwards upon the lateral aspect. It is the rule among Monkeys for this fissure to be largely concealed by the cerebellum. Its exposure for its whole length in Cynopithecus appears to me to be a characteristic feature of the brain of that monkey. 2 * |