. Bulletin. Natural history. Text-fig. 76. Posterior view of right quadrate. A. Clidastes propython (\'PM 1368, X Yz- ^• Clidastes liodontus (YPM 3996, x 1/4). the type of C. stenops (Cope, 1875, pi. 14 fig. 2a) has been laterally crushed, and the unusual condition of this element in C. medius is probably best considered as due to post-mortem distortion or damage (see also Williston, 1898b, p. 203). Genus MOSASAURUS Conybeare 1822 (Text-fig. 59) Mosasaurus Conybeare, 1822, p. 198. Batrachiosaurus Harlan, 1839a, p. 24. Batrachotherium Harlan, 1839b, p. 89. Macrosaurus Owen, 1849, p. 382. Drepan
. Bulletin. Natural history. Text-fig. 76. Posterior view of right quadrate. A. Clidastes propython (\'PM 1368, X Yz- ^• Clidastes liodontus (YPM 3996, x 1/4). the type of C. stenops (Cope, 1875, pi. 14 fig. 2a) has been laterally crushed, and the unusual condition of this element in C. medius is probably best considered as due to post-mortem distortion or damage (see also Williston, 1898b, p. 203). Genus MOSASAURUS Conybeare 1822 (Text-fig. 59) Mosasaurus Conybeare, 1822, p. 198. Batrachiosaurus Harlan, 1839a, p. 24. Batrachotherium Harlan, 1839b, p. 89. Macrosaurus Owen, 1849, p. 382. Drepanodon Leidy, 1856, p. 255. Lesticodus Leidy, 1861, p. 10. Baseodon Leidy, 1865, p. 69. Nectoportheiis Cope, 1868a, p. 181. Pterycollosaurus Dollo, 1882, p. 61. Generic Type. Mosasaurus hoffmanni Mantell 1829. Additional References (North American material). Morton, 1830a, p. 289; 1834, p 27. Harlan, 1834b, p. 81; 1834e, p. 32; 1835a, p. 285. Bronn, 1838, p. 760. DeKay, 184: p. 28. Pictet, 1845, p. 621; 1853, p. 504. Holmes, 1849, p. 197. Gibbes, 1851, p. 3. Emmons, 1858, p. 213, fig. 34? Leidy, 1858b, p. 176; 1860, p. 91; 1865a, p. 30, pi. 7 figs. 1, P15-16, pi 17 figs. ?12-I3; 1865b, p. 69; 1873, p. 279. Cope, 1869b, p. 260; 1869-1870, p. 186, ?fig 49(2); 187If, p. 401; 1875, p. 269; 1877, p. 567; 1879b, p. 36. Hayden, 1872, p. 91. Marsh 1877, p. 346. Lydekker, 1888, p. 261. Merriam, 1894, p. 6. Williston, 1895, p. 166; 1897d pp. 177, 179, 181; 1898b, pp. 91, 195; 1902, p. 249; 1914, p. 165. Douglass, 1902, p. 212 Pompeckj, 1910, pp. 130, 131. Gilmore, 1912b, p. 2; 1926, pi. 62 fig. 8; 1928, p. 87. Stern berg, 1915, p. 132. Camp, 1923, p. 322. Nopsca, 1928, p. 177. McDowell and Bogert, 1954, pp. 132, 138. Romer, 1956, p. 561. Diagnosis. Premaxilla with small rostrum anterior to premaxillary teeth. Thirteen to fifteen teeth in maxilla. Prefrontal forms small portion of posterolateral border of external nares, small to large triangular ala projects laterally from supraorbital w
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