PUOSEXCEPHALON OF MAMMALS. 



131 



sylvian, 12, coronal, is, lambdoidal, U, frontal, 14 , superfrontal, 

 14", mid-frontal, 17', exoccipital, and 17 X , postoccipital. The folds 

 are: e, sylvian, /, medial, m, medilateral, ?z, postfrontal, ?i' s 



Midas. 



116 



Macacus. Infant, 7 mo. 



Adult. 



Fcetus, 3 mo. Lemur. 



CV1)U3. 



(.'liinil'nnzee. 



Homo. 



superfrontal, n" , midfrontal, n'" ', subfrontal, o, ectorbital, />, 

 lambdoidal, q, occipital, q", suroccipital, q"' ', suboccipital. 



The primary fissures on the internal (mesial) surface of the 

 hemisphere, fig. 118, are 4, hippocampal, with its long bifurcate 



ir 



Vertical section, brain of Baboon. 



posterior extension, 4', 7, callosal, 7 X , supercallosal, 6, marginal, 1 

 13 7 3 entolambdoidal, here continued into the posthippocampal ; the 

 supercallosal fissure, 7', bifurcates anteriorly, as inPapio, fig. 117, 

 /' and Pithecus (vol. ii. fig. 149). The surface applied to the 

 fore part of the falx is impressed by falcial, 1.3, and subfalcial, \z>' ', 



1 This is seldom so distinct or continuous as in the larger ungulates. 



K 2 



