On the structure of the orang outang / by Henry C. Chapman.

  • Henry Cadwalader Chapman
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: On the structure of the orang outang / by Henry C. Chapman. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    monkeys, for tliere is no necessity of having recourse to such measures to prove that the cerebellum is covered in the latter? In the account I gave of the female Chimpanzee,’ I stated that I found the cerebellum uncovered. I had the opportunity a short time since, of verifying that statement in the male, noticing in situ that the cerebellum was uncovered by the posterior lobes. This was found to be the case by Mr. Arthur Browne, the Super- intendent of the Phila. Zool. Garden, in a third Chimpanzee which died there. With all deference to Prof. Marshall’s^ photo- graph of a plaster cast of the brain of a Chimpanzee, and how- ever it ma}^ truthfully represent the relations of the cerebellum in his specimen, I must say that it would be simply monstrous if accepted as an illustration of either of mine, and with profound respect for Prof, Huxley’s^ opinion regarding the interior of the skull being a guide for the determination of the proportion between posterior lobe and cerebellum, I find it anything but a safe one as regards the anthropoid apes. For the space between yjosterior lobes of brain and dura mater and bone, both posteriorly and lateralh^ I find very variable in situ, due to the state of the blood vessels and amount of fiuid in arachnoid and subarachnoid cavities. In speak- ing of the Gorilla, Prof. Bischoff^ observes, p. 100, “ Das es bei ersterem am wenigsten von oben Hinterlappen der grossen Hemi- sphare bedeckt wird und bei der Betrachtung des Schadel gewiss von oben mit seinem hinterem Rande sichtbar wird.” And in reference to the Chimpanzee,’’ p. 95, “ Die Hinterhauptslappen des grossen Gehirns bei diesem Affen wie bei dem Menschen das kleine Gehirn iiberzogen und von oben fast ganz bedec'ken.” And Yrolik*’states, p. 7, of the Orang : “ Ce lobe [)osterieur ne se prolonge pas autant que chez I’homme ; il ne recourve pas si bien le cervelet du moins il ne cache pas completement surtout vers les cotes.” The fact of the cerebellum being covered by the posterior lobes in my Orang and that figured by Gratiohd, and but slightly uncovered in that of Yrolik’s, is no more strange than that Bischofi’ should find it covered in one Hylob ites, and Prof. Huxle} '’ having stated it to be uncovered in another. I did not observe anything particularly noticeable about the ^ Proceed, of Acad., 1879. Man’s place in Nature, p. 97. ^ Gehirn des Chimpanzee, 1871. ' Beitrage zur Hylobates, 1870. Natural History Review, 1861. ‘ Das Gehirn des Gorillas, 1877. ’’’ Amsterdam Verslagen, Deel 13, 1862. Vertebrate Anatomy, p. 411.
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