1880.] 



PROF. FLOWER ON ICTICYON VENATICUS. 



75 



different groups of the Carnivora', that the fourth (counting from the 

 middle hne) or inferior gyrus of the Dog is represented by the outer 

 or mfenor 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, m, and i. superior, middle, and inferior lateral gyri. 



Fiff. 7. 



Side view of brain of Icticyon ; natural size. 

 S. Sylvian 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 Canidte. 



Other Carnivora, and is in many iEluroids already partially marked 



off by an interrupted sulcus, I am not prepared on that account to 



accept the conclusion that the Dog is a further modification of the 



1 See P. Z. S. 1869, p. 482. 



