HAY.] 



Dysg-anus encaustus Cope. 

 Cope, E. D. 1876 H, p. 250. 



1877 G, p. 572. 

 Cretaceous (Laramie); Montana. 



Dysganus haydenianus Cope. 

 Cope, E. D. 1876 H, p. 251. 



CATALOGUE. 



505 



Cope, E. D. 1877 G, pp. 572, 596. 



Cretaceous (Laramie); Montana. 



Dysg-anus peiganus Cope. 



Cope, E. D. 1876 H, p. 252. 



1877 G, p. 572. 

 Cretaceous (Laramie); Montana. 



ORNITHOTARSUS Cope. Type 0. immanis Cope. 



Cope, E. D. 1869 H, p. 123. 



1869 M, p. 120. 



1883 J, p. 99. 



Morse, E. S. 1880 A, p. 7. 

 Zittel, K. A. 1890 A, p. 765. 



Ornithotarsus immanis Cope. 

 Cope, E. D. 1869 H, p. 123. 



Cope, E. D. 1869 D. 



1869 M, p. 121, figs. 35-36a. 



1875 E, p. 248. 



1885 R. 



Nopcsa, F. B. 1899 A, p. 577. 

 Cretaceous; New Jersey. 



PNEUMATOARTHRUS Cope. Type P. peloreus Cope. 



Cope, E. D. 1870 I, p. 446. 



1875 E, p. 260. (Pneumatarthrus.) 

 1878 I, p. 236. (Pneumatarthrus.) 



Zittel, K. A. 1890 A, p. 765. (Syn.? of Ornithotar- 

 sus.) 



Pneumatoarthrus peloreus Cope. 

 Cope, E. D. 1870 I, p. 446. 



Cope, E. D. 1872 L, p. 433. (Pneumatarthrus.) 



1875 E, p. 260. (Pneumatarthrus.) 

 Leidy , J. 1865 A, p. 100, pi. xii i, figs. 27, 28. ( Young? 

 of Hadrosaurus.) 

 Cretaceous; New Jersey. 



NANOSAURID,E. 



Marsh, O. C. 1878 B, p. 244. 



1895 C, p. 498. 



1896 C, p. 244. 



Marsh, O. C. 18% D, p. 211. 

 Zittel, K. A. 1890 A, p. 766. 



NANOSAURUS Marsh. Type N. agilis Marsh. 



Marsh, O. C. 1877 D, p. 254. 

 1891 F, p. 337. 



1894 E, p. 87. 



1895 C, p. 498. 



1896 C, pp. 199, 201, 202. 



1897 C, p. 483. 



Nicholson and Lydekker 1889 A, p. 1059. 

 Steinmann and Doderlein 1890 A, p. 624. 

 Williston, S. W. 1878 A, p. 45. 

 Zittel, K. A. 1890 A, p. 766. 



Nanosaurus agilis Marsh. 

 Marsh, O. C. 1877 D, p. 254. 



King, C. 1878 A, p. 346. 



Marsh, O. C. 1894 E, pi. vi, fig. 3. 



1896 C, p. 199, text figs. 42, 43. 



1897 C, p. 484, figs. 27, 28. 

 Jurassic; Colorado. 



Nanosaurus rex Marsh. 



Marsh, 0. C. 1877 G, p. 516. 



King, C. 1878 A, p. 346. 



Marsh, O. C. 1894 E, p. 88, pi. vi, flg. 5. 



1896 C, p. 200, text figs. 44-^8. 



1897 C, p. 484, fig. 29. 

 Jurassic; Colorado. 



MACELOGNATHID^E. 



Marsh, O. C. 1884 C, p. 341. | Woodward, A. S. 1887 C, p. 8. 



MACELOGNATHUS Marsh. Type M. vagans Marsh. 



Marsh, 0. C. 1884 C, p. 341. 



Amer. Geologist, 1891 D. 



Baur, G. 1891 D, p. 450. (Cceluras.) 



Marsh, O. C. 1897 C, p. 608. 



Nicholson and Lydekker 1889 A, p. 1089. 



Zittel, K. A. 1890 A, p. 513. 



For this genus Professor Marsh has estab- 

 lished the family Macdognathidx and the order 



Macelognatha, and assigned them a place among 

 the Testudinata. The relationships of the fossil 

 are problematical. 



Macelognathus vagans Marsh. 

 Manh, 0. C. 1884 C, p. 341, figure. 



1897 C, p. 507, figs. 65,66. 

 Jurassic; Wyoming. 



