418 



PHYSIOLOGY 



supra-callosal convolution above, and the hippocampal convolution and the 

 uncus below. The chief fissures separating these are the Sylvian fissure, the 



A 



Fcrtbfa'm 



yel f 



Cortex 



-Cerebellum 



!'!.. 211. Diagrams from Monakow, showing the evolution of the neopalliinii, 

 and the gradual shifting of the visual sensory tracts from the mid-brain to the fore- 

 brain, and thence to the occipital cortex.' 



A, a bony fish. B, brain of a lizard. C, brain of a mammal (cat). 



central sulcus or fissure of Rolando, the parieto-occipital fissure, the cal- 

 caiine li>>iiiv. the collateral fissure, and the calloso-marginal fissure. Each 

 of the main lobes (or gyri; mentioned above is further subdivided by smaller 



