. 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. 1924] SA UROPODA AND THEROPODA OF MONGOLIA 5 4. Referred tooth of Asiatosaurus (Amer. Mus. 6532), Field No. 378. 5. A sauropod tooth fragment (Field No. 378). Three miles east of Red Mesa, from a higher level, about 600 feet. 6. Amer. Mus. 6533, two anterior dorsal vertebrse, badly weathered
. 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. 1924] SA UROPODA AND THEROPODA OF MONGOLIA 5 4. Referred tooth of Asiatosaurus (Amer. Mus. 6532), Field No. 378. 5. A sauropod tooth fragment (Field No. 378). Three miles east of Red Mesa, from a higher level, about 600 feet. 6. Amer. Mus. 6533, two anterior dorsal vertebrse, badly weathered, several ribs, and one chevron; three ribs and chevron collected (Field No. 106); see photograph, Fig. 4. 7. Single dorsal vertebra, badly weathered, not collected. Found 100 feet from vertebrje (Amer. Mus. 6533) possibly belonging to the same in- dividual. Ondai Sair Formation, Mt. Uskuk. 8. One rib (Amer. Mus. 6258).. Fig. 4. Two anterior dorsal vertebrae, several ribs, and a chevron of a sauropod dinosaur in situ. Oshih (Ashile) formation, Oshih Basin, August, 1923; Albert F. Johnson, collector. Owing to their much weathered and disintegrated condition, the two vertebrse were not taken. Conclusion.—Awaiting the evidence afforded by more perfect material, Asiatosaurus seems to resemble Camarasaurus in the subspatu- late form of the summit of the crowns, in its large anterior teeth diminish- ing gradually to the smaller posterior teeth of similar general spatulate pattern. We await with interest comparison of these teeth with those of the analogous African 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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