642 MR. W. A. FORBES ON THK TJAKARI MONKEYS. [NoV. 30 



much smaller, short sulcus, easily seen internally, but only just 

 appearins; on the inferior mnvgin of the lobe externally. 



The internal surface of the hemispheres has the ordinary sulci 



Fi"-. 



/. 



Brain of Keel Uakari, seen from above. 

 Fig. 8. 



Eight half of the same, seen from below, 

 well displayed. The calloso-marginal sulcus {an) (scisswe sous- 

 frontale) somewhat broken up anteriorly, inclines posteriorly tovvards 

 'the margin of the hemispheres, but does not reach it by about '1 incli. 



