1882.] PROF. ST.-GEORGE MIVART ON THE .ELUROIDEA. 517 



goes on forwards beyond it. The sulcus between the superior lateral 

 gyrus and the middle lateral gyrus extends so as almost to join the 

 supraorbital sulcus. 



In Protdes the crucial sulcus is well developed, much as in the Cats ; 

 and the same is the case in Uyana and Crocuta}, which have additional 

 sulci on the inside of the superior lateral gyrus, and generally on 

 that part of the inferior lateral gyrus which is posterior to the Sylvian 

 fissure. The large forms of Hei-pestes show a tendency to the same 

 development ; and iu Herpestes andCrossarchus there is a small crucial 

 sulcus. 



The Eye. 



The tapetum in Genetta tigrina and in Hemigalea closely re- 

 sembles that of Felis catus. 



The pupil may contract so as to leave a vertical slit, as in most 

 Cats and in Paradoxurus ; or an oblong erect aperture, as in Felis 

 chaus ; or a horizontally extended aperture, as in, at least some, Her- 

 pesies and Bdeogale ; or in a circular aperture, as in the Lion and 

 larger Cats. 



The Ear. 



The external ear in Genetta tigrina has a reduplication, forming 



External ear of Genetta tigrina, cut open below and"reflected. 

 f, tragus ; at, antitragus ; e, supratragiis ; p, poueli ; h, helix; ah, aniilielix ; 



/ fossa of helix. 



a°pouch at the lower part of the hind margin of the concha, much 

 as in the Cat ; but the pouch is not so deep. 



There is a tragus which fits into a concavity of the double anti- 

 tragus ; and there is a supratragus ; but the latter is not so elongate 

 and pedunculate as in the Cat. 



1 P. Z. S. 1879, p. 90. flgs. .5 & 6. 



