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Comparative anatomists have of late directed considerable attention to the determination of the relations of the cerebrum and cerebellum. This has been in great measure due to the publication by Professor Owen of a system of classification of the Mammalia founded on their cerebral characters. The statement made by that eminent anatomist, that the posterior, or third, lobe of the cerebrum is peculiar and common to the genus Homo, and that equally peculiar are the “posterior horn of the lateral ventricle” and the “hippo-campus minor,” which characterise the hind lobe, has led to much discussion. Various anatomists have published descriptions and drawings of dissections of the brains of many of the Quadrumana, especially of several of the higher apes.
page 549 note * See Professor Huxley, Dr Allen Thomson, Dr Rolleston, and Mr Marshall, in vol. i. of “Natural History Review,” 1861; Professors Van der Kolk and Vrolik in January No. for 1862; Professor Huxley, “Proceedings Zoological Society,” 1861; Mr Flower, “Proceedings Royal Society of London,” 20th June 1861, and 9th January 1862.
page 550 note * Icones Cerebri Simiarum, p. 48.
page 550 note † Leçons d'Anatomie Comparée, vol. iii., 1845.
page 550 note ‡ Müller's Archivs, 1846, p. 154.
page 550 note § Mr Marshall, in his description of the brain of a young chimpanzee (Nat. Hist. Rev., vol. i. p. 298), has pointed out very clearly, in the brain of that animal, the changes which ensued after removal from the skull, and immersion for a time in spirit.
page 553 note * Since this paper was read before the Society, I have dissected in situ the brain of a young Shacma, and have found that the cerebrum projected beyond the cerebellum, both laterally and posteriorly. The vermiform process protruded slightly beyond the cerebellar hemispheres. The projection of the cerebral hemispheres backwards beyond the worm was rather less than 
of an inch, whilst on each side of the worm it extended to rather more than of an inch behind the cerebellar hemispheres. The cerebellar and posterior cere-bral fossæ in the cranium exhibited an arrangement in conformity with this disposition of the encephalon. (March 27th.)
page 554 note * Each hemisphere of Delphinus Tursio, measured 5 inches and 
in its antero-posterior diameter. The cerebrum extended 2 inches and 
behind the posterior end of the corpus callosum, the inferior surface of which mass of cerebrum was in relation to the tentorial surface of the cerebellum.
page 555 note * Anatomie und Bildungs-geschichte des Gehirns, &c. Nürnberg, 1816. p. 147.
page 556 note * Most anatomists, I think, will admit that a very correct general conception of these relations may be obtained in those cases where it is difficult to procure the brains themselves, by making casts of the cranial cavity. The accuracy of this method is ensured, even more absolutely, when the tentorium is ossified.
page 557 note * Tiedemann, Anatomie des Gehirns, p. 146; Icones, p. 48. Cruveilhier, Descriptive Anatomy, p. 1013. Stannius, Lehrbuch, pp. 389, 390.
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