. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 430 THE CAT. [chap. XII. of Professor Gaudiy. It is only therefore here noticed among cat remains,* because Professor Cope appears to regard it as a primfeval cat, and it certainly does resemble the cats in the shape of the sectorial teeth, the upper one of which has the internal cusp—which, however, we have seen to be wanting in the living ^isi not. size Fig. 18S.—Skull of Arclia:lurus dehilis (Cope), from Orecon. § 18. A very remarkable miocene fossil, which seems really
. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 430 THE CAT. [chap. XII. of Professor Gaudiy. It is only therefore here noticed among cat remains,* because Professor Cope appears to regard it as a primfeval cat, and it certainly does resemble the cats in the shape of the sectorial teeth, the upper one of which has the internal cusp—which, however, we have seen to be wanting in the living ^isi not. size Fig. 18S.—Skull of Arclia:lurus dehilis (Cope), from Orecon. § 18. A very remarkable miocene fossil, which seems really to have been a kind of primaeval cat, is the genus Arch.^lurus of Professor Cope, t This has the usual number of incisors and canines, but has four premolars and a tubercular molar in the upper jaw, and three premolars and two molars in the lower jaw. Its feet are very slender. The single species of the new genus is described as follows :— "Mandible, with the anterior face of the symphysis, separated from the lateral face by an angle which is not produced downwards. Superior sectorial without anterior lobe;:}: inferior'sectorial with a heel. General structure of the jaws, weak; superior canine, small, little compressed, with an acute posterior edge which is not serru- late ; first premolar in each jaw, one rooted; second inferior pre- molar, large; sectorials large; diastemata very short; alveolar border below the inferior sectorial and tubercular teeth everted, forming a large osseous callus, which has a free inferior and pos- terior margin, the latter rising into the base of the coronoid pro- cesses ; zygomata slender; post-orbital processes little prominent; front wide, convex transversely. About the size of the ; This is certainly the most exceptional and uncatlilvO of all feline skulls. • It appears to have liml an ali- sphf^iioid canal, and M. Fillml regards it as perhaps allied to Cnjplnproda. As to these matters, see the chapter on the Cat's p
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