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Show 24 MR. F. E. BEDDARD ON THE [Jan. 17, The intraparietal sulcus of brain No. 2 of Cynopithecus is precisely like that of a Macaque or a Baboon, in that it does not bend outwards before joining the Simian fissure ; this intraparietal fissure does not reach the fissure of Rolando. The fissure or Rolando itself only cuts the inter-hemispheral sulcus on the right side of the brain. The median parieto-occipital sulcus in the brain of Cynopithecus which I describe here for the first time has a forward inclination as in the Macaques. Text-fig. 11. Brain of Cynopithecus niger (dorsal aspect). c. Lateral occipital fissure; Ca. Calcarine fissure; d. Intraparietal fissure; Ii. Fissure of Rolando; S. Sylvian fissure. It will be observed, therefore, that in every feature in which the smaller brain of the female Cynopithecus differs from the Macacine and agrees with the Semnopithecine brain, a contradiction is shown in the larger brain of the male Cynopithecus. This latter brain, in short, is most emphatically a Baboon's brain; it belongs to the Macacine type. The only certain conclusion to be drawn from these facts is that the brain of Cynopithecus may show all the typical Macacine characters. Though this is a conclusion which might be expected in view of the other zoological characters of the Celebesian |