The Journal of the Linnean Society of London . P; So. Fig. Fig. 4. Dorsal surface of brain of Galictis, natiu-al size. C. Crucial sulcus. P. Parietal gyrus, ^c. Precrucial sulcus. 8. Sylvian gyrus. 8a, Sagittal gyrus. 8f. Sylvian fissure. Fig. 5. Lateral view of brain of Galictis, natural size. C. Crucial sulcus. P. Parietal gyrus, pc. Precrucial sulcus. 8. Sylvian gyrus. 8a, Sagittal gyrus. 8f. Sylvian fissure. Grisonia *.—The brain of the Grison is so different from thatof the Tayra (^Galictis) as to constitute an argument of someweight in favour of the distinctness of the two genera. In
The Journal of the Linnean Society of London . P; So. Fig. Fig. 4. Dorsal surface of brain of Galictis, natiu-al size. C. Crucial sulcus. P. Parietal gyrus, ^c. Precrucial sulcus. 8. Sylvian gyrus. 8a, Sagittal gyrus. 8f. Sylvian fissure. Fig. 5. Lateral view of brain of Galictis, natural size. C. Crucial sulcus. P. Parietal gyrus, pc. Precrucial sulcus. 8. Sylvian gyrus. 8a, Sagittal gyrus. 8f. Sylvian fissure. Grisonia *.—The brain of the Grison is so different from thatof the Tayra (^Galictis) as to constitute an argument of someweight in favour of the distinctness of the two genera. In thatof the G-rison, the hippocampal gyrus is cut off from the sagittalgyrus by the junction of the calloso-marginal and crucial is also a much larger proportional part of cerebrum infront of the crucial sulcus in Grisonia than is the case in sagittal gyrus is very wide, and blends anteriorly with theparietal gyrus. The Sylvian gyrus is oblique and rather short. The crucial sulcus is well developed, and an Ursine lozenge is more or
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectzoology, bookyear1865
