. 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. Fig. 6. Deltatheridium pretrituberculare. Referred specimen. X fi. Its cusp structxire is obscure, while that of the trigonid seems to be as in M2. The latter is of primitive tuberculo-sectorial type, the three trigonid cusps distinct, sharply pointed, and erect. The pr'd is higher than the
. 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. Fig. 6. Deltatheridium pretrituberculare. Referred specimen. X fi. Its cusp structxire is obscure, while that of the trigonid seems to be as in M2. The latter is of primitive tuberculo-sectorial type, the three trigonid cusps distinct, sharply pointed, and erect. The pr'd is higher than the pa'd and the latter is higher than the me'd. The talonid is a little shorter than the trigonid and is narrow and does not extend so far externally as the trigonid. Its cusps have been worn off. Mi is similar to M2, save that the trigonid is a little narrower. P4 is not at all molariform, but is 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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