| OCR Text |
Show 1882.] PROF. ST.-GEORGE MIVART ON THE ALUROIDEA. 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 Hyana 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 andCrossarchus there is a small crucial sulcus. THE EYE. The tapetum in Genetta tigrina and in Hemigalea closely resembles 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, Herpestes 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. t, tragus ; at, antitragus ; e, supratragus ; p, pouch ; h, helix; ah, anfihelix ; 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 antitragus ; and there is a supratragus ; but the latter is not so elongate and pedunculate as in the Cat. i P. Z. S. 1879, p. 90, figs. 5 & 6. |
