312 PHYSIOLOGICAL SERIES. 



D. 397. The brain of an Asiatic Tapir (Tn^inia i/ttlicus). 



In this brain the lips of the main sulci have born 

 rated. The opercular nature of the perisylvian cortex is 

 well shown. 



The posterior horizontal limb of the suprasylvian sulcus 

 is well developed and more like that of other Ungulates. 



0. C. 1330 B a. 



D. 398. The brain of a Tapir ( Tapirus sp.) in which the arach- 

 noid and piu mater have been left in situ on the right side. 



0. C. 1330 B. 



Family RHINOCEROTIDA:. 



D. 399. The brain of an Indian Rhinoceros (Rhi 



This brain resembles that of the Horse in si/c and struc- 

 ture. The cerebral hemispheres, however, are narrower in 

 front and broader behind than those of the Horse. 



The pyriform lobe presents the peculiar features seen in 

 the Equidfe, and to a less extent in the Tapirida.-. 



The Sylvian region is like that of the Horse. 



The coronal, lateral, suprasylvian, and orbital sulci arc 

 like those of the Tapir, but enormously more complicated 

 by lateral branches and compensatory sulci. O. C. 1330 E. 



Krueg, Zeitsch. f. wiss. Zoo!., Bd. xxxi. 1878, p. 327. 



Holl, Archiv. f. Anat. 1900, p. 328. 



D. 400. The brain of a Sumatran Rhinoceros (Dicerorhinus sunm- 

 trensis), ( ? ). 



Although the Sumatran Rhinoceros is smaller than tin- 

 Indian -|>ccie-. the brain is even more richly supplied with 

 secondary sulci, so that the surface of the hemisphere 

 P resents an exceedingly complicated pattern of enteriiorm 

 gyri. The fundamental plan, however, is the same as that 

 of the Tapir. 0. C. 13:',o K. 



Presented /'// Ihf Zotilnyical <SV>< /'/ ///. 

 (iarrod, Trans. Zool. Soc., vol. x. 1877, p. 411. 



D. 401. Tiie r.-i-t of the crania Tcavity of a Sumatran Rhinoceros 

 mmotn n*is). 



