. On the anatomy of vertebrates [electronic resource] . Ease of brain, Didelphys. MACEOMYELON OF MAMMALIA. 80 of grey matter called corpus dentatum. The pons, fig. 60, 5, c,by its prominence and anteroposterior extent, corresponds withthe great lateral developement of the cerebellum, e. When the prepyramids, fig. 55, p, are divaricated in the human macromyelon, the54 median fissure, which is xsgp^s^ wider and shallower than. anterior or ventral of the Brain, Horae Man, xxxni. that, c, below the decussation, shows the same cribriform cha-racter of its i floor, formed by the penetrat
. On the anatomy of vertebrates [electronic resource] . Ease of brain, Didelphys. MACEOMYELON OF MAMMALIA. 80 of grey matter called corpus dentatum. The pons, fig. 60, 5, c,by its prominence and anteroposterior extent, corresponds withthe great lateral developement of the cerebellum, e. When the prepyramids, fig. 55, p, are divaricated in the human macromyelon, the54 median fissure, which is xsgp^s^ wider and shallower than. anterior or ventral of the Brain, Horae Man, xxxni. that, c, below the decussation, shows the same cribriform cha-racter of its i floor, formed by the penetrating vessels fromthe fold of pia mater which lined it. A further extent ofdivarication shows transverse fibres uniting the halves of this partof the macromyelon, and decussating with longitudinal fibres, asin fig. 56. The section of the prepyramid on each side of a, , shows its triangular figure and the restriction of grey matterto the f nuclei, r, s ; they are mainly composed of white longi-tudinal fibres which enter the pons above its lower or peripheraltransverse fibres, and interlace with the fibres of a higher plane:at the entry each pyramid is constricted, as at fig. 56, p, but soonexpands. The proportion of the decussating and non-decussatingtracts of the prepyramidal columns is shown in fig. 56, where j>is part of the right prepyramid cut across near the pons andreflected to show the decussating fasci
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