. On the anatomy of vertebrates [electronic resource] . tivedepth unfolds Although the olfactory nerve be notdeveloped in DelpMnidce, the rhinal, , b, and basirhinal, b, tracts are de-fined by the ectorhinal fissure, 2, a circumstance significative of thederivation of this marine family from some form of the Mammalianclass, retaining, as in Balcenicice, the usual provision of nerves ofspecial sense. In fig. 95 are shown the extent of the corpuscallosum, b, the depth of the cerebral fissures, and the proportionsof the f corpus striatum, d, k, the optic thalamus, i, and thehippocampus
. On the anatomy of vertebrates [electronic resource] . tivedepth unfolds Although the olfactory nerve be notdeveloped in DelpMnidce, the rhinal, , b, and basirhinal, b, tracts are de-fined by the ectorhinal fissure, 2, a circumstance significative of thederivation of this marine family from some form of the Mammalianclass, retaining, as in Balcenicice, the usual provision of nerves ofspecial sense. In fig. 95 are shown the extent of the corpuscallosum, b, the depth of the cerebral fissures, and the proportionsof the f corpus striatum, d, k, the optic thalamus, i, and thehippocampus, g, with its unusually broad etaenia, h, or free bordercontinued into the i fornix. A beginning of the ( posterior hornof the lateral ventricle is now first shown. - e The primary cerebral convolutions in the hoofed Mammals have 1 The preparation of the Porpoises brain, by which I showed this structure in the Hunterian Course of 1842, is pi\ bably still preserved in the Museum of the RoyalCollege of Surgeons : the primary convolution g is removed. 94. Del-phinns ; upper surface of righthemisphere. 120 ANATOMY OF VERTEBRATES. a general disposition, converging from behind forward as far asthe anterior third of the cerebrum, and thence diverging, but indifferent Both Artiodactyle and Perissodactyle ordersinclude species as small as a rabbit; yet the Pigmy Chevrotain 95
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