284 PHYSIOLOGICAL SERIES. 



D. 366. The brain of a " Bornean Sun-Bear " (Ursti* in<(l<i//>i/n/.< ). 



0. C. i;L>f> TA. 



D. 367. The brain of a Grisly Bear ({'/>>/> -./'. rox). 



0. C. 13- 



D. 368. The brain of a Syrian Bear (Ursus syriacus). 



0. C. 1325 T a. 

 Presented by Dr. Auckland. 



D. 369. A cast of the cranial cavity of Ailuropus melanolen 



The brain itself could not have afforded a better demon- 

 >t ration of the arrangement of the typically Arctoid pseudo- 

 sylvian, suprasylvian. orbital, corono-lateral, ansate, crucial 

 and precrucial sulci. The lesser degree of macrosmatism 

 resulting in the attenuation of the olfactory bulbs and 

 peduncles prepare- us for the condition we find in tin 

 Bear (Otaria). 



Suborder PINNIPEDIA. 

 Family OTARIID^E. 



D. 370. The brain of a "Sea-Bear" (Otaria : till,'*/>ii) (c?),in 

 which the two cerebral hemispheres have been separated 

 from the rest of the brain. 



[The interpretation of the sulci of the Pinnipeds given 

 in these accounts will be found to be utterly at variance 

 with those of Turner and Kiikenthal and Ziehen (or Flat a u 

 and Jacobsohn, \vho follow the latter). This is no place i<> 

 di-cuss the grounds for the views presented, but if the 

 readn- carefully examines, in the order named, the brains 

 of Ursus maritimus, Ursus labiatus (specimen D. ,'W. r >) [or 

 Meles meles], Otaria, Odobcenus, and Phoca, tbe writer 

 feels assured that no further advocacy of his views will be 

 necessary to convince the reader of their o-mtial accuia- \.] 



" The brain of the Sea-Bear is ver\ instructive, for it 

 supplies what would otherwi.-e he a ' missing-link ' of much 

 importim.-e between the brain of the SeaU and that it 

 ordinary land ('arnivora. In the first place it is inter- 

 mediate in general form. It is h rounded than in the 

 Jgj but ditVer> from that of ordinary < 'jmiivora by being 



