NERVOUS SYSTEM. VERTEBRATA. 297 



The " Ursine lozenge " is especially distinct and much 

 larger than usual, the precrucial sulci being unusually 

 great. The coronal sulcus is joined to the lateral. 



Almost the whole of the anterior vertical limb of the 

 suprasylvian fissure can be seen in the anterior lip of the 

 " Sylvian fissure." 



The cranial nerves are well demonstrated in this speci- 

 men. They conform to the usual mammalian type. The 

 large seventh and eighth pairs are especially prominent. 



0. C. 1325 vo. 



D. 385. A cast of the cranial cavity of a Hooded Seal (Cystophora 

 cristata). 



D. 386. A cast of the cranial cavity of an Elephant-Seal (Macro- 

 rJdnus leoninus). 



The extraordinary shape of the hemispheres produced by 

 the pronounced lateral divergence of their caudal extremities 

 is well shown. 



Turner, ' Challenger ' Reports, " Seals," p. 92. 



OEDER UNGULATA. 



Suborder HYRACOIDEA. 



D. 387. The brain of a Hyrax (Procavia capensis), ( ? ), (figs. 168- 



170). 



Fig. 168. (Nat. size.) 



SULC.SPLEN. 



SULC.COR 



SULC.LAT. 



In the accounts of the brain of the Hyrax hitherto 

 published a considerable amount of discrepancy exists, but 



