NERVOUS SYSTEM. VERTEBRATA. 253 



seen indenting the posterior lip of the sulcus at about its 

 mid-point. 



The posterior ectosylvian sulcus gives off no branches 

 such as its representative in the other specimen exhibits. 



The sulcus which Holl (op. cit.) would call the " anterior 

 terminal '' (i. e. the anterior limit of the area usually sub- 

 merged in the " Sylvian fissure ") is much longer in this 

 specimen, especially on the right side. 0. C. 1325 i. 



D. 303. The brain of a Genet (Genetta vulgaris). 



The brain of the Genet closely resembles that of the Civet 

 as regards most of its features. There is no typical crucial 

 sulcus. There is, however, a shallow depression on the 

 dorsal surface, which is regarded by some writers as the 

 representative of the crucial. 



On the right side the intercalary sulcus extends obliquely 

 forward and upward almost as far as the dorsal edge far 

 forward in the hemisphere. 



On the left side the true intercalary sulcus is quite dis- 

 tinct from an anterior snlcus which may possibly represent 

 the crucial. 



No ectosylvian sulcus can be recognised with any degree 

 of certainty, but there is a pseudosylvian sulcus resembling 

 that of the Cat. 0. C. 1325 H b. 



D. 304. The brain of a Genet (Genetta vulgaris). 0. C. 1325 H. 



D. 305. The brain of an African Genet (Genetta tigrina), ( ? ). 

 This resembles that of the Common Genet. 



0. C. 1325 H a. 

 Presented by St. George Mivart, Esq. 



D. 306. The brain of a Cape Mongoose (Herpestes pulveru- 

 lentus), (<$). 



This brain is peculiar in many respects. 



There is a very extensive crucial sulcus placed far 

 forward on the hemisphere and in free communication 

 with the intercalary sulcus on the right side, but not on 

 the left. This is all the more noteworthy when the slight 

 development or absence of a crucial sulcus in other 

 Viverridse is recalled. 



