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Show 140 ME. F. E. BEDDABD ON THE BEATN OF GULO. [Feb. 19, however, absolutely ignorant of the characters of the convolutions of the cerebral hemispheres ; for a cast of the inside of the skull has been described and figured by Gervais \ whose paper is duly quoted by Mivart. It is, however, much more satisfactory to base a description upon the actual brain, which I now propose to do. I have compared the brain with actual specimens of the brains of Nasua rufa, Meles taxus, Ictonyx zorilla, Galictis barbara and Mustela foina, which are among the Prosector's stores, besides, ot course, with the descriptions and figures of Mivart and others. Fig. 1. Brain of Gulo (dorsal view). c, crucial sulcus. The outline of the brain of Gulo is, as will be seen from the accompanying drawing (fig. 1), remarkable. It is almost that of a square surmounted by a triangle, the line of division being the crucial sulcus. The cerebellum is largely hidden by the cerebral hemispheres, as is the case with some other Arctoidea, notably Ictonyx. Mustela stands at the opposite extremity, the cerebellum being in that animal but slightly overlapped. The Sylvian fissure is long. As is generally the case with the 1 " Memoire sur les formes cer6brales propres aux Carnivores," Nouv. Arch. Mus. vi. p. 103. |
