. Bulletin. Natural history. RUSSELL: AMERICAN MOSASAURS 139 Type. AMNH 1389, from ". . Monmouth Co., N. ; (Cope, 1869-1870, p. 189). Type specimen includes a quadrate, jaw fragments, and seven vertebrae. Distribution. Navesink Formation and younger Cretaceous, New Jersey; Ripley Formation, Tennessee; Navarro Formation, Texas. Additional References. Leidy, 1865a, figs. 1-3, 5-6, 8-9, 12, 15-19, 23, 29-31, 33, pi. 8 fig. 11, pi. 9 figs. 1-3, 5-7, 11, pi. 10 figs. 1-5, 8-10, 16, pi. 11 figs. 6-7, 11-13, pi. 19 fig. 6, pi. 20 figs. 3-6. Cope. 1869c, p. 86; 1869-1870, pp. 188, 189, 192
. Bulletin. Natural history. RUSSELL: AMERICAN MOSASAURS 139 Type. AMNH 1389, from ". . Monmouth Co., N. ; (Cope, 1869-1870, p. 189). Type specimen includes a quadrate, jaw fragments, and seven vertebrae. Distribution. Navesink Formation and younger Cretaceous, New Jersey; Ripley Formation, Tennessee; Navarro Formation, Texas. Additional References. Leidy, 1865a, figs. 1-3, 5-6, 8-9, 12, 15-19, 23, 29-31, 33, pi. 8 fig. 11, pi. 9 figs. 1-3, 5-7, 11, pi. 10 figs. 1-5, 8-10, 16, pi. 11 figs. 6-7, 11-13, pi. 19 fig. 6, pi. 20 figs. 3-6. Cope. 1869c, p. 86; 1869-1870, pp. 188, 189, 192, figs. 48(1), 49(1), pi. 11 figs. 7-8; 1871a, p. 571; 1875, p. 269, pi. 37 figs. 13, 15-17. Lydekker, 1888, p. 264. Baur, 1892, p. 4. Williston. 1897c, p. 110. ^V'hitfield, 1900, p. 25, pi. 4 figs. 1-2, pi. 5 figs. 1-2. Abel, 1922, fig. 269. Gilmore, 1926, p. 191. pi. 71 figs. 6, 8. Chaffee, 1939, fig. 1(5). Miller, 1955, pp. 905, 909. Edmund. 1960. fig. 25d. Referred Specimens. AMNH nos. ?1391, 1392 (M. oarthrus), ?1393, ?1397, 1398 (M. fulciatus), 1404, 1406, YPM nos. 305, 306, 307, 311, ?414, *430 (M. princeps), 470, 508, 509, 510 690, ?773, 1504, 1527, 1529, 1530, 1574, 1575. ANSP nos. 8462, 8472, ?8473, ?8474, 8476, 8478, 8479, 8481, 8482, 8503, 8505, 8507, 8508, 8513, 8514, 8515, 8516, 8517, 8519, 8520, 8524, 8531, 8540, 8546, 8547, ?9641. USNM no. 10540. CNHM no. PR491. NJSM nos. *11052, **11053. TMM **specimen. Diagnosis. Slight medial dorsal crest on premaxilla. Small triangular ala projects laterally from supraorbital wing of prefrontal. Narial emargination begins dorsal to point between fifth and sixth maxillary tooth. Parietal foramen large, bounded by two long tongues from frontal. Large keel-shaped tuberosity below stapedial pit on lower. Text-fig. 80. Lateral view of left quadrate of Mosasatirus maximus (YPM 430, X %). medial body of quadrate, suprastapedial and infrastapedial process very small in lateral profile. Ventral wings of coronoid well developed on med
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