402 PHYSIOLOGICAL SERIES. 



the Sylvian fissure. On the left hemisphere it is linked by 

 a shallow furrow to the orbital sulcus. 



The sulcus called " rectus" in the lowlier Cebidse is now 

 broken up into two separate sulci: the " rectus" (sensu 

 stricto) and the "arcuatus;" corresponding respectively to 



SULC. CALL MAR6.0NTERCAL.) 



/m^te^^ 3 " 



SULC. PAR. OCC.. 



SULC. P. CALC. 



SULC. CALC. 



the inferior frontal and the inferior precentral sulci of 

 Human Anatomy. 



Immediately external to the typical posterior rhinal fissure 

 there is a small inferior temporal sulcus. 0. C. 1337 K e. 



D. 576. The brain of a White-cheeked Capuchin (Cebus lunatui). 



This specimen closely resembles the last. Upon the 



right hemisphere the anterior end of the superior limiting 



sulcus of Reil can just be seen emerging from the Sylvian 



fissure on to the orbital surface. 0. 0. 1337 K/. 



D. 577. The brain of a White-fronted Capuchin {Cebus albifrons). 

 In this brain the Affenspalte is a simple sulcus lying 

 some distance behind the transverse occipital ramus of the 

 intraparietal sulcus. There is a feeble depression repre- 

 senting the ramus postcentralis superior of the intrapariefad 

 sulcus in the left hemisphere. 0. C. 1337 K c. 



D. 578. The brain of a White-fronted Capuchin (Cebus albifrons). 



The region around the intraparietal sulcus is disj 

 like that in the two specimens of C. lunatus. Tin- Simian 

 sulcus, however, is very small on the left hemisphere, so 

 that the whole of the intraparietal sulcus can be s< n. 

 No part of the superior limiting sulcus is exposed. 



0. C. 1337 K a. 



