. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 1925] FAUNA OF GASH A TO FORMATION, MONGOLIA. Fig. 1. PalcBostylops iturus, new genus and species. Lower jaw with complete dentition, except crowns of first two incisors; superior, external and internal views. Type specimen, No. 20414. Four times natural size. description from any of our spe
. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 1925] FAUNA OF GASH A TO FORMATION, MONGOLIA. Fig. 1. PalcBostylops iturus, new genus and species. Lower jaw with complete dentition, except crowns of first two incisors; superior, external and internal views. Type specimen, No. 20414. Four times natural size. description from any of our specimens. On the inner side of the tooth is a sharp internal cingulum, extending around the bases of the two inner lophs. Metaloph absent on m', which is of trigonal outline and smaller than m^; m^ smaller than m^, of similar pattern but less extended anteroposteriorly. The upper premolars are much smaller than the molars, of simple construction, sharp, high external crest on all and a basal internal pillar on p--*, none on p^ The canine is larger than p' but only its alveolus is preserved. The infraorbital foramen is above the anterior end of m*; the zygomatic process is stout and springs from a point between m^ and m'. The affinities of this genus to the notoungulates can hardly be questioned; but it is more primitive than any described form in the. 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 Central Asiatic Expeditions (1921-1930); Andrews, Roy Chapman, 1884-1960; Matthew, William Diller, 1871-1930. [New York : American Museum of Natural History
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