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Show 1880.] PROF. FLOWER ON ICTICYON VENAT1CUS. 75 different groups of the Carnivora1, that the fourth (counting from the middle line) or inferior gyrus of the Dog is represented by the outer or inferior portion of the third (counting in the same way) of the Fig. 6. Upper surface of brain of Icticyon; natural size. c. crucial sulcus; s, ni, and i. superior, middle, and inferior lateral gyri. Fig. 7. Side view of brain of Icticyon.; natural size. S Svlvian fissure * c. crucial sulcus ; S. superior lateral gyrus ; m. middle lateral gyrus; i. inferior lateral gyrus; i'. imperfect second inferior lateral gyrus,'usually complete in the Canidaj. other Carnivora, and is in many iEluroids already partially marked off by an interrupted sulcus, I a m not prepared on that account to accept the conclusion that the Dog is a further modification of the i See P. Z. S. 1869, p. 482. |