. Bulletin - American Museum of Natural History. Natural history; Science. 222 Bulletin American Museum of Natural History. [Vol. VI, outer angles and upon the inner face. In I'm. 3 these features are strength- ened, and this tooth exhibits a postero-internaJ shelf. I'm. 4 has a well-devel- oped internal cusp (deuterocone) surrounded bj a basal cingulum ; the proto- cone issubcrescentic. The molars exhibit rather low obtuse cusps of crescentic form, with the characteristic protoconule ; the parastyle and mesostyle are low and obtuse; the metastyle is rudimentary or incipient except in M. 3; th
. Bulletin - American Museum of Natural History. Natural history; Science. 222 Bulletin American Museum of Natural History. [Vol. VI, outer angles and upon the inner face. In I'm. 3 these features are strength- ened, and this tooth exhibits a postero-internaJ shelf. I'm. 4 has a well-devel- oped internal cusp (deuterocone) surrounded bj a basal cingulum ; the proto- cone issubcrescentic. The molars exhibit rather low obtuse cusps of crescentic form, with the characteristic protoconule ; the parastyle and mesostyle are low and obtuse; the metastyle is rudimentary or incipient except in M. 3; the internal cingulum is not very prominent. In general these teeth are of the low selenodont type found in the European forms. The locality is the ' Metamynodon stratum ' of the Oreodon Beds. The description of this specimen was completed when a communication was published by Professor Marsh' oi a new species, Heptacodon curius, founded upon a single molar tooth, and said to be " apparently allied to ; The type of H. curtus is slightly smaller than the specimen here described. The author does not recognize the relationship to Anthraco- therium. Anthracotherium karense, sp. nov. This is a larger form from the Protoceras beds, and is repre- sented l»\ the last two upper molars of the left side (No. 1040). It is well distinguished by the ver) strong development of the. /// / /// 2 First and Si 'I I ppei Molars ol Anthracotherium knt <u type Natural size. ostyle upon and M. 3, and h\ the prominent metastyle upon \1. 3 I he molars arc of larger size than in / occidentale, the ' nsps are more elevated and more sharply crescentic, the ih- 1 â \.v â¢-â¢. Mioceni Mammal,' Vm Joui Si . Ma;. 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 American Museum of Natural History; Allen, J.
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