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Show 1867.] DR. J. E. GRAY ON THE RHINOCEROTIDAE. 1021 There is a single skull of a half-grown animal of this species in the British Museum (722 e), which was received from the Zoological Society, without any special habitat. In the roundness of the nose it shows some affinity to the skull of R. sumatrensis; it is different from that species in many particulars, in the prominence of the occipital portion of the skull, and especially of the occipital condyles. When placed by the side of a R. unicornis of the same size and condition of teeth it stands rather higher, and is immediately known by the length and sleuderness of the nose and nasal bones. The following fossil species probably belong to this genus :- 1. RHINOCEROS LEPTORHINUS, Cuvier, Oss. Foss. ii. 71, t. 9, 10, 11; Blainv. Osteogr. t. Rhinoceros cuvieri, Desm. M a m m . 402. Hab. Fossil. 2. RHINOCEROS INCISIVUS, Cuvier, Oss. Foss. ii. 89, t. 6. f. 9, 10; Blainv. Osteogr. 1. Hab. ? Cuvier (Oss. Foss. ii. 71, t. 9. f. 7) figures a fossil skull of a species of this genus from a drawing made at Milan by M . Adolphe Brongniart. See also an imperfect skull figured by Blainville (Osteographie, t. 14, figure at left upper corner of the plate). 2. CERATORHINUS. Skin divided into shields by deep folds, the lumbar fold rudimentary, short, only occupying the middle of the space between the groin and the back. Horns two: front longer, curved backwards; hinder small, conical. Skull:-forehead narrow, flat; the upper part of the nose on each side of the horns narrow, rounded, sub-cylindrical ; the occipital region erect, the part near the condyles rather concave, the occipital condyle short, broad, oblong, placed obliquely inferior, scarcely prominent; lachrymal bone very large, irregular-shaped. 1. CERATORHINUS SUMATRANUS. B.M. R. bicorne de Sumatra, Cuvier, Oss. Foss. ii. 27, t. 4, iii. 42, t. 78. f. 8 (from Bell, skull). Rhinoceros sumatrensis, Cuvier ; Blainv. Osteogr. t. 2 (skull 5 ), t. 7 (teeth). Rhinoceros de Java, F. Cuvier, M a m . Lithog. t. (not good). Sumatran Rhinoceros, W . Bell, Phil. Trans. 1793, p. 3, t. 2, 3, 4 ; Home, Phil. Trans. 1821, p. 270, t. 21, 22. Rhinoceros sumatranus, Raffles, Linn. Trans, xiii. 268 ; Blainv. Osteogr. t. (skull); Gerrard, Cat. Bones B. M. 282; Muller, Verhand. t. 35 (old and young); Blyth, P. Z. S. 1861, p. 306, 1862, p. 1; Journ. Asiat. Soc. Bengal, xxxi. 1862, p. 151, t. 3. f. 1, 2, 3. |