50 Bulletin American Museum of Natural History. [Vol. XIX, 



the specimens which Cope has (and, so far as I can see, cor- 

 rectly) identified as 5. phlebotomus . This specimen, No. 1907, 

 is here figured (Fig. 38) and it will be seen that it is much 

 more pointed than is the one figured by Dr. Loomis. The 

 latter is probably 5. xiphirostris Stew., the premaxilla of 

 which is shown here by Fig. 39. 



There seems to be only one objection to Stewart's identifica- 

 tion of his specimen, and that is found in the relative lengths 

 of the dentary and maxilla. Cope's specimens indicate that 

 the dentary projected farther in front of the premaxillaries 

 than Stewart's figures would suggest. The tooth line of the 

 dentary of Cope's type must have had a length of 98 mm. ; 

 the maxillary tooth line a length of 60 mm. If now we add 

 to the latter 20 mm. for the premaxilla, we have 18 mm. for 

 the distance which the dentary projected beyond the pre- 

 maxillary. How the discrepancy is to be explained is now 

 uncertain. 



Saurocephalus lanciformis Harlan. 



Saurocephalus lanciformis Harlan (R.), Jour. Acad. Nat. Sci. Phila. 

 (i), III, 1824, p. 337, pi. xii; Trans. Geol. Soc. Penn. I, 1834, 

 pt. i, p. 83; Med. and Phys. Res. 1835, pp. 286, 289, 366. — 

 ? Morton (S. G.), Amer. Jour. Sci. XXVIII, 1835, p. 277.— 

 Owen (R.), Odontog. 1845, p. 130, pl.lv. — Giebel (C. G.), 

 Fauna Vorwelt, I, pt. iii, 1848, p. 89. — Leidy (J.), Proc. Acad. 

 Nat. Sci. Phila. 1856, p. 302; Trans. Amer. Philos. Soc. XI, 1857, 

 p. 87, pi. vi, figs. 8-11. — PicTET (F. J.), Traits Pal6ont. 1854, 

 ed. 2, p. 93. — ?? Spillman (W.), Hilgard's Rep't on Geol. Miss. 

 i860, pp. 142, 389. — Cope (E. D.), Proc. Amer. Philos. Soc. XI, 

 1870, p. 530; U. S. Geol. Surv. Wyom. 1871, p. 415; Vert. Cret. 

 Form. West, 1875, pp. 216, 275. — Davies (W.), Geol. Mag. (2), 

 V, 1878, p. 260. — Newton (E. T.), Quart. Jour. Geol. Soc. 

 XXXIII, 1878, p. 786. — Stewart (A.), Kansas Univ. Quart. 

 VII, 1898, p. 186. — Hay (O. P.), Amer. Jour. Sci. (4), VII, 1899, 

 p. 299, figs. 1-4. — LooMis (F. B.), Palseontogr. XLVI, 1900, p. 

 251, pi. XXV, figs. 2-5. — Stewart (A.), Univ. Geol. Surv. 

 Kansas, VI, 1900, p. 392. — Woodward (A. S.), Cat. Foss. 

 Fishes, IV, 1901, p. 113. — Hay (O. P.), Bibliog. and Cat. Foss, 

 Vert. N. A. 1902, p. 386. 



Saurodon lanciformis Hays (I.), Trans. Amer. Philos. Soc. (2), III. 

 1830, p. 477, pi. xvi, fig. II. 



