LEMUR MONGOZ 



31 



bellum is not so covered). The hemisphere of lemur is in many respects 

 intermediate and transitional between the lower mammals and the higher 

 primates (Fig. 18). 



Courtesy, American Museum oj Natural Historic 



FIGS. 10 AND II. HAND AND FOOT OF LEMUR MONGOZ. 

 Left. Dorsum of hand showing discrete digitation with tendency to syndactyle. 

 Right. Dorsum of foot showing toe-nails, digitation with marked syndactyle, and opposable great toe. 



CONVOLUTIONS, LOBES AND OTHER SURFACE CHARACTERISTICS 



In the convohitions of the lemur brain only the first tendency may be 

 seen to develop that gyral arrangemnct which is characteristic of the apes. 

 The lobation of the hemispheres is correspondingly limited, the boundary 

 between the frontal and parietal lobes existing as a faint indentation indi- 

 cating the inception of the sulcus centralis. The division between the parietal 

 and temporal lobes is more clearly defined in the boundary line established 

 by the Sylvian fissure. 



The temporal lobe has shown but slight advance over what is charac- 

 teristic of the carnivores, with the possible exception of the disappearance of 



