. Bulletin of the British Museum (Natural History), Geology. FROM THE SAMOS HIPPARION FAUNA 265 The supposed P. rotundicornis mandible from Maragha (Mecquenem 1924, pi. 7 fig. 5) is smaller than the mandibles among which some may be accepted as P. houtumschindleri, its molars have no goat folds, the basal pillars range in size from moderate on Mi and M2 to slightly smaller on M3, and the back lobe of M3 is quite large and possesses a central cavity. This and other similar mandibles are not P. houtumschindleri, but they might belong to the species which Mecquenem (1924 : 30) called Gazella depe
. Bulletin of the British Museum (Natural History), Geology. FROM THE SAMOS HIPPARION FAUNA 265 The supposed P. rotundicornis mandible from Maragha (Mecquenem 1924, pi. 7 fig. 5) is smaller than the mandibles among which some may be accepted as P. houtumschindleri, its molars have no goat folds, the basal pillars range in size from moderate on Mi and M2 to slightly smaller on M3, and the back lobe of M3 is quite large and possesses a central cavity. This and other similar mandibles are not P. houtumschindleri, but they might belong to the species which Mecquenem (1924 : 30) called Gazella deperdita (see p. 284 footnote and Gentry 1970 : 273). The specific name of this species was wrongly spelled by Pilgrim & Hopwood (1928) as houtum-schlindleri with two Ts. Prostrepsiceros rotundicornis (Weithofer) 1865 Palaeoveas lindermayeri (in part) Gaudry : 292, pi. 52 fig. 5. 1888 Helicocevas rotundicorne Weithofer : 288, pi. 18 figs 1—4. 1889 Helicophora rotundicornis (Weit.). Weithofer : 79. 1903 Helicotragus rotundicornis (Weit.). Palmer : 873. 1908 Antidorcas? gaudryi Mecquenem : 52. 1924 Helicophora rotundicornis Mecquenem : 39, pi. 7 fig. 1. 1926 Helicoceras fraasii Andree : 163, pi. 11 fig. 4; pi. 15 fig. 1. 1928 Helicotragus fraasii (Andree). Pilgrim & Hopwood : 23. Lectotype. The Pikermi specimen figured by Weithofer (1888, pi. 18 figs 1, 2) in the Natural History Museum at Vienna was chosen by Pilgrim & Hopwood (1928 : 21). Localities. Pikermi, Samos, Maragha. Age. Lower Pliocene. Diagnosis. Horn cores are less massive than in Maragha examples of P. houtumschindleri, with some degree of antero-posterior compression; posterior keel. media. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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