. Bulletin of the British Museum (Natural History), Geology. 416 A. W. GENTRY. Fig. 34 Incisors of Dicerorhinus in medial view to show differences in root curvature. Right I2, (above) x 0-5. left I2, (below). 8. Rhinoceros browni, first described by Colbert (1934) under the generic name Gaindatherium and figured by him and by Heissig (1972). It is known from the Chinji Formation and other pre-Hippahon localities of the Siwaliks Group in Pakistan, where it predates other rhinoceroses like Aceratherium and Br achy pother ium (Guerin in Pilbeam et al. 1979: 36; Barry et al. 1982:
. Bulletin of the British Museum (Natural History), Geology. 416 A. W. GENTRY. Fig. 34 Incisors of Dicerorhinus in medial view to show differences in root curvature. Right I2, (above) x 0-5. left I2, (below). 8. Rhinoceros browni, first described by Colbert (1934) under the generic name Gaindatherium and figured by him and by Heissig (1972). It is known from the Chinji Formation and other pre-Hippahon localities of the Siwaliks Group in Pakistan, where it predates other rhinoceroses like Aceratherium and Br achy pother ium (Guerin in Pilbeam et al. 1979: 36; Barry et al. 1982: 113-4). The taxonomy and history of Oligocene and earlier Miocene rhinoceroses is confused. Many generic names have been used besides those so far mentioned while multitudes of species-level names have been founded and used in differing combinations with the generic names. Comparative material in the British Museum (Natural History) comprised mainly fossils and casts from the Upper Miocene of Eppelsheim, Germany and the Lower and Middle Miocene of some French localities, the Lower Miocene of Jebel Zelten, Libya, the Lower Miocene of some Kenyan localities and the basal Miocene of Dera Bugti, Pakistan. Comparisons. In Ronzotherium upper molars it is mainly the massive lingual and posterolabial cingula, the stronger indication of a mesostyle, the posteriorly open postfossette and the curved ectometaloph of M3 which differ from the Arabian teeth. Strong cingula also occur on Ronzo- therium lower molars and premolars. The upper premolars differ by having strong cingula as in the molars, a stronger metacone rib and fusion between the protocone and hypocone. Radinsky (1967: 5) and Heissig (1969: 15) agree that primitively rhinocerotid P3s and P4s would have had a protocone linked or almost linked by a protoloph to the ectoloph. The hypocone was definitely linked with the protocone- protoloph but only more weakly via the metaloph to the ectoloph. This is the condition found in Ronzot
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