. The American diceratheres. Rhinoceroses, Fossil; Paleontology. 438 MEMOIRS OF THE CARNEGIE MUSEUM. proximately correct, as it corresponds with those in Coenopus tridactylus Osborn which was found, articulated, in the upper Oligocene of South Dakota.^^ The first dorsal vertebra is characterized by the proportionally large and high. Fig. 21. Fig. 22. Fig. 21. Dicerathermm cooki Peterson. No. 2499, Coll. Carnegie Museum. Lateral and posterior views of seventh cervical. X i- Firi. 22. Diceratherium cooki Peterson. No. 2499?, Coll. Carnegie Museum. Lateral and posterior views of first dorsal. X |
. The American diceratheres. Rhinoceroses, Fossil; Paleontology. 438 MEMOIRS OF THE CARNEGIE MUSEUM. proximately correct, as it corresponds with those in Coenopus tridactylus Osborn which was found, articulated, in the upper Oligocene of South Dakota.^^ The first dorsal vertebra is characterized by the proportionally large and high. Fig. 21. Fig. 22. Fig. 21. Dicerathermm cooki Peterson. No. 2499, Coll. Carnegie Museum. Lateral and posterior views of seventh cervical. X i- Firi. 22. Diceratherium cooki Peterson. No. 2499?, Coll. Carnegie Museum. Lateral and posterior views of first dorsal. X |. neural spine and the depressed centrum; the prezygapophyses are also much ex- panded laterally to receive the postzygapophj'ses of the last cervical. The articu- lations for the ribs are located very low on the side of the centrum and the pedicel is broad and heavy. With the exception of the skull, there is probably no other part of the skeleton in this species which is subject to greater variation than the neural spines of the dorsal vertebrae. In specimens undoubtedly referable to adult and old males 28 Osborn, H. F., Bull. Amer. Mus. Nat. Hist., Vol. V, 1893, p. 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 Peterson, O. A. (Olof August), 1865-; Carnegie Museum. Pittsburgh : Published by the authority of the Board of Trustees of the Carnegie Institute
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleontology, bookyea
