374 PHYSIOLOGICAL SERIES. 



the intermediate sulcus, which is joined to the Sylvian in 

 D. 536, is here joined to the parallel sulcus. 



0. C. 1337 A g. 



D. 540. Two casts of the cranial cavity of a Lemur {Lmnur 

 macaco) . 



This shows in an admirable manner the exact shape and 

 relations of the cerebral hemispheres, olfactory bulbs, and the 

 cerebellum. We can also distinctly see deep grooves 

 produced by the Sylvian and posterior rhinal fissures, the 

 intraparietal, parallel, and coronal ( u rectus '') sulci, and 

 also the small sulcus tentatively called " central." 



D. 541. The brain of a Great Galago (Galago crassicaudatd), of 

 which the left hemisphere is separate. 



The rhinal and Sylvian fissures present the characteristic 

 features. 



There is a typical intraparietal sulcus, but its postlatefal 

 (transverse occipital) elements are fragmentary and separate. 



The parallel sulcus is represented merely by a short 

 shallow furrow. 



There is a typical orbital sulcus and a sulcus rectus which 

 approaches near to the intraparietal. There is no sign of a 

 separate " central " sulcus, except a shallow depression 

 above the sulcus rectus. 0. C. 1337 Ba. 



F. E. Beddard, Proc. Zool. Soc. 1895, p. 146. 



D. 542. The brain of a Garnett's Galago (Galago garm-ili] 

 (figs. 214 and 215). Though only slightly smaller than the 



Fig. 214. (Nat. size.) 



SULC.INTRAPAR. 



SULC ORB. ^- \/ 



SYL f 



OLF. BULB 



other brain of a 6ra/a#0, this specimen exhibits in comparison 

 with the latter a pronounced paucity of sulci. It also 

 serves to demonstrate how great a change has taken pl;i< 

 in the occipital regions of the brain. When compan-d 





