. On the anatomy of vertebrates [electronic resource] . fig. 99, 4,sylvian, fig. 106, 5, callosal, fig. 99,7, lambdoidal, figs. 96,101,13,and entolambdoidal, fig. 99, 13, supersylvian, fig. 101, 8, andlateral or medilateral, ib. 10. In Tragulus, fig. 101, this is slightlyindicated: in Hyrax, fig. 96, 10, it is longitudinal but also shows a frontal fissure, ib. 14, and the postsylvianfissure, ib. 9. But the chief difference is seen in the course of thefissure 13, which, impressing the inner and posterior side of thehemisphere at fig. 99, 13, converges toward its fellow in Tragulus,b
. On the anatomy of vertebrates [electronic resource] . fig. 99, 4,sylvian, fig. 106, 5, callosal, fig. 99,7, lambdoidal, figs. 96,101,13,and entolambdoidal, fig. 99, 13, supersylvian, fig. 101, 8, andlateral or medilateral, ib. 10. In Tragulus, fig. 101, this is slightlyindicated: in Hyrax, fig. 96, 10, it is longitudinal but also shows a frontal fissure, ib. 14, and the postsylvianfissure, ib. 9. But the chief difference is seen in the course of thefissure 13, which, impressing the inner and posterior side of thehemisphere at fig. 99, 13, converges toward its fellow in Tragulus,but diverges as it advances, in Hyrax, and extends beyond thefrontal fissure, 14, simulating the longitudinal one in the samepart of the brain in the Agouti, Sloth, and Aye-aye. Its fore-partruns into the superfrontal fold, n, or divides it from the sub-frontal, n. We may trace the homologue of is, interrupted bysecondary fissures, marking off a less elongated mesial tract of thebrain, in the Horse, fig. 97, and Rhinoceros, fig. 98. The primary 99 100. Hyrax. surface of hemisphere. fissures, in Hyrax, define the following folds: viz., sylvian, , 106, e, e, postsylvian, ib. f, part of supersylvian, ib. g,blending with the medilateral or medial, I, the entolambdoidal,fig. 99, p, rising to the upper surface, confluent with the tractrepresenting the superfrontal, »*; in like manner the sylvian,fig. 96, e, blends with the subfrontal tract, ib. n. On the innersurface of the hemisphere, the hippocampal fold, fig. 99, a, the cal-losal, k, and entolambdoidal, //, are defined; with an indication ofa falcial fold, o. The ectorhinal fissure at the base of the brainbounds the outer side of the rhinencephalic part, and divides itfrom the more exterior part of the natiform protuberance. In the larger Perissodactyles, the expansion of the hinder partof the hemispheres is attended with a greater recession of thesupersylvian fissures, fig. 97, Horse, and fig. 98, Rhinocer
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