THE BRAIN OF THK LEMURS. 



81 



Tlie Brain of Grlobilemur. 



The consideration of the features of this brain led me in my 

 Memoir to such indecisive atid unsatisfactory results, that no 

 apology is needed for again returning to the study of a form of 

 such interest. 



The British Museum has recently acquired, fragments of two 

 crania oi Nesopithecus, a genus which is either identical with or 

 very closely related to GlohiJemur. Plaster moulds of the brain- 

 cavity of these fragments were made, and, at the kind suggestion 

 of Dr. Porsyth Major, replicas of the casts were sent to me by 

 Dr. Smith Woodward. 



Fiff. A. 



One of these (fig. A) represents a considerable part of the 

 dorsal aspect of the brain ; but, unfortunately, it does not show 

 any part below the level of the reference-line g in fig. 40 of my 

 memoir. The second cast represents' only the anterior ex- 

 tremities of the cerebral hemispheres, i. e. the area containing 

 the coronal, diagonal, and orbital sulci. 



Unlike the complete cast described, in the body of my memoir 

 (Mem. figs. 39 and 40), these two fragments exhibit deep and 

 exceedingly well-defined sulci. This fact, however, only renders 

 the incompleteness of the specimens all the more tantalizing, 



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