. Catalogue of the fossil Mammalia in the British museum, (Natural History) . i. Philad. vol. v. p. 122 (1851 ; vol. dated 1852); 2 hoc. cit. 3 Amer. Journ. ser. 3, vol. i\. p. 248 (1875). PART III. l 50 TTNGULATA. monodactyle character of one species, and the structure of the craniumand dentition is, however, so essentially equine, that it is here placedin the present family. The upper premolars are as complex as thetrue molars, and all the cheek-teeth are of an extremely hypsodonttype, the cement completely filling the valleys; the lower molarsare crescentoid, and there is s
. Catalogue of the fossil Mammalia in the British museum, (Natural History) . i. Philad. vol. v. p. 122 (1851 ; vol. dated 1852); 2 hoc. cit. 3 Amer. Journ. ser. 3, vol. i\. p. 248 (1875). PART III. l 50 TTNGULATA. monodactyle character of one species, and the structure of the craniumand dentition is, however, so essentially equine, that it is here placedin the present family. The upper premolars are as complex as thetrue molars, and all the cheek-teeth are of an extremely hypsodonttype, the cement completely filling the valleys; the lower molarsare crescentoid, and there is scarcely any distinct third lobe to m. digits are either one or three in number. Genus HIPPARION, Christol \Syn. Hippoiherium, Kaup2. Dentition:—I. |, C. j, Pm. 3, M. |. The first upper cheek-tooth,which appears with the milk-series, and apparently has no prede-cessor, is usually shed before the animal is adult. The anterior pillar 3 in the upper cheek-teeth is disconnected from the anteriorinner crescent for at least three quarters of its length ; and there Kg. /• d. Hipparion, —Polished section of three right upper cheek-teeth, in a frag-ment of the maxilla ; from the Siwaliks of Perim Island, Gulf of Cam-bay, India. Indian Museum, Calcutta (no. C. 273). a. Posterior, andb, anterior outer crescent; c, anterior, and d, posterior inner crescent;e, anterior, and /, posterior pillar. (From the Palseontologia In-dica.) y. 1 Ann. Sci. Indust. Mid. France, vol. i. p. 180 (1832), teste Christol. 2 Neues Jahrb. 1833, p. 327. As a subgenus. 3 For the definition of the terms employed in the description of the cheek-teeth of the Equities, see Palseontologia Indica (Mem. Geol. Surv. Ind.),ser. 10, vol. ii. pp. 73, 74, and the accompanying woodcut (fig. 11). 4 If this form be specifically distinct, it has been proposed that it should beknown as H. feddeni, Lydekker, Palseontologia Indica, ser. 10, vol. iii. p. 16(1885). equid^:. 51 are three digits in each foot, with th
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