1882.] PROF. ST.-GEORGE MIVART ON THE ZLUROIDEA. 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 Proteles the crucial sulcus is well developed, much as in the Cats ; 
and the same is the case in Hyena 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 Herpestes show a tendency to the same 
development ; and in Herpestes and Crossarchus there is a small crucial 
sulcus. 
Tue 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- 
pestes and Bdeogale ; or in a circular aperture, as in the Lion and 
larger Cats. 
Tue Ear. 
The external ear in Genetta tigrina has a reduplication, forming 
External ear of Genetta tigrina, cut open below and?reflected. 
4, tragus ; at, antitragus ; e, supratragus ; p, pouch ; h, helix; ah, antihelix; 
F, 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.8. 1879, p. 90, figs. 5 & 6. 
