. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. grey matter enveloping the central medullaiy tract in each lateral moiety of the chord is shewn in the three situations marked 1, 2, and 3 (fg. 119); the superior expansion and com- plexity of the grey matter in the anterior columns of the pelvic enlargement accords with the predominance of the locomotive over the sensitive function* in the strong saltatory hind legs of the Kangaroo. Organs of Sense.—The olfactory nerves and the osseous cavities and laminae destined for the protection and support of the pituitary membran
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. grey matter enveloping the central medullaiy tract in each lateral moiety of the chord is shewn in the three situations marked 1, 2, and 3 (fg. 119); the superior expansion and com- plexity of the grey matter in the anterior columns of the pelvic enlargement accords with the predominance of the locomotive over the sensitive function* in the strong saltatory hind legs of the Kangaroo. Organs of Sense.—The olfactory nerves and the osseous cavities and laminae destined for the protection and support of the pituitary membrane offer a remarkable proportional development in all the Marsupials, and more especially in the Insectivorous and Carnivorous tribes. The outer root of the olfactory nerve appears as a continuation of the whole nati- form protruberance; a corresponding accumu- lation of nervous matter," protuberantia py- riformis,"f at the base of the inner root of the olfactory nerve has already been noticed; both these broad tracts consist externally of grey matter: the middle or medullary root of the nerve is the smallest. It is very con- spicuous in the Wombat, where it emerges from a longitudinal fissure at the anterior and inner part of the " protuberantia ; The olfactory nerves or rather lobes are hollow, and contain, as in most Mammalia, the ante- Stapes of the Kan- garoo. ' Mayo, Outlines of Physiology, p. 235. '•tiwv/, VUkllllCO VI J^ I Phil. Trans. 1837, p. rior continuation or extremity of the lateral ventricles (o, fig. 118). The filaments pass from the skull through several foramina of a cribriform plate. Certain species of Kangaroo, of the subgenus Osphranter, Gould, remarkable for their acuteness of smell, have the turbinated bones so large that the lateral expansion of the nasal cavity forms a marked feature in the skull. The chief deviation from the Mammalian type in the organ of hearing presents itself in the form of the stapes, th
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