298 PHYSIOLOGICAL SERIES. 



examination shows (the writer has examined seven brains) 

 that the features of the brain vary greatly in different 

 specimens. 



The general appearance of the brain (tig. 1(>S) is not 

 unlike that of a Sloth. The pattern of the sulci on the 

 hemisphere, however, is distinctly Ungulate though much 

 simplified. 



Thus the rhinal fissure is approximately horizontal (tig. 

 l(>y) : the calcarine sulcus (tig. 170) is prolonged into an 



Fig. 169. (Nat. size.) 



SULC. SURRAS. 



i 



SULC. CUR 



SULC.P.SYL 



SULC.SPLEN. 



SULC ORB. 



Fig. 170. (Nat. size.) 



SULC.SPLEN. 



intercalary sulcus which extends the whole length of the 

 hemi>pheiv. ;md is placed wholly upon the dor<al surface, 

 >\\c\\ .)* i- commonly the case among Ungulates and occur- 

 only in //fllrti.x among Carnivores : there is a well- 

 de\. -loped -upni-vlvian Slllcus in the form of a flattened 

 bow, such as W6 find in the smaller (Vrvid:e and in the 

 Tragulidfv : there is cither no postsylvian sulcus or the 

 -li-ht imteli leli\\ the auprasylvian suh-u- re|tre>ent- ;i 

 Herpe-tiiM' lorni ot thi- >ulcus. 



