326 



FOSSIL VERTEBRATA OF NORTH AMERICA. 



[BULL. 179. 



MYLEDAPHUS Cope. Type M. bipartitus Cope. 



Cope, E. D. 1876 H, p. 260. 



Myledaphus bipartitus Cope. 

 Cope, E. D. 1876 H, p. 260. 

 1877 G, p. 574. 



Cretaceous (Fort Union); Montana. 



The relationships of this fossil are doubtful. 



HEDRONCHUS Cope. Type H. xternbergi Cope. 

 Cope, E. D. 1876 H, p. 259. 

 Hedronchus sternbergi Cope. 



Cope, E. D. 1876 H, p. 259. 

 1877 G, p. 574. 

 1880 Q. 



Cretaceous (Ft. Union); Montana. 

 The relationships of this fossil are extremely 

 problematical. 



ICHTHYODORULITES. 



Agassiz, L. 1843 B, iii, pp. 1, 67, 69, 212. 



1844 B, p. 111. 

 Hay, O. P. 1899 F, p. 682. 

 Jaekel, O. 1890 D. 

 Koninck, L. G. de 1878 A, p. 65. 

 Newberry and Worthen 1866 A, pp. 113-127. 



Pictet, F. J. 1854 A, p. 229. 



St. John and Worthen 1875 A, pp. 420-48S 



1883 A, pp. 233-260. 

 Woodward, A. S. 1891 A, pp. 92-159. 

 Zittel, K. A. 1890 A, pp. 115-122. 



ONCHUS Agassiz. Type 0. murchisoni Agassiz. 



Agassiz, L. 1843 B (1837), iii, p. 6. 



1843 A.' 



1844 A. 



1844 B, p. 117. 



Eichwald E. 1860 A, p. 1594. 

 Basse, C. 1878 A, p. 144. 



1879 A, p. 59. 

 McCoy, F. 1855 A, p. 577. 

 Nicholson and Lydekker 1889 A, p. 940. 

 Owen, R. 1860 E, p. 100. 

 Pictet, F. J. 1854 A, p. 283. 

 Reis, O. M. 1896 A. 

 Rohon, V. 1893 A, p. 38, with figures. 



1899 A, p. 9. 



Traquair, R. H. 1899 A, p. 843. 

 Woodward, A. S. 1891 A, p. 94. 

 Zittel, K. A. 1890 A, pp. 64, 67, 166. 



Onchus clintoni Claypole. 

 Claypole, E. W. 1885 D, p. 61, fig. 0. 



1884 A, p. 1225. (No description). 

 1895 G. 



Lesley, J. P. 1892 A, p. 774. 

 Woodward, A. S. 1891 A, p. 96. 

 Zittel, K. A. 1890 A, p. 317. U). clintonensis.) 

 Silurian (Clinton); Pennsylvania. 



Onchus pennsylvanicus C 'lay pole. 

 Claypole, E. W. 1885 D, p. 61, fig. 5. 



1885 A, p. 426. 

 1885 C. 



Lesley, J. P. 1892 A, p. 774. 



Upper Silurian; Pennsylvania. 



Onchus rectus Eastman. 



Eastman, C. R. 1899 F, p. 323, fig. 4. 

 Devonian (Catskill); New York. 



CTENACANTHUS Agassi/. Type C. major Agassiz. 



Agassis, L. 1843 B (1837), iii, p. 10. 



1843 A. 



1844 A. 



1844 B, p. 119. 



American Geologist 1888 A. 

 Barkas, W. J. 1874 A, p. 386. 



1878 B, p. 145, 

 Claypole, E. W. 1885 B. 



1895 C. 



Davis, J. W. 1883 A, p. 332. 

 Garman, S. 1884 C. 

 Gill, T. 1884 C. 

 McCoy, F. 1855 A, p. 624. 

 Koninck L. G. de 1878 A, p. 65. 



Miller, S. A. 1889 A, p. 593. 

 Newberry, J. S. 1873 A, pp. 279, 325. 



1873 C, p. 27. 



1889 A, p. 197. 



Newberry and Worthen 1866 A, pp. 116, 118. 

 Nicholson and Lydekker 1889 A, pp. 940, 968. 

 Pictet, F. J. 1854 A, p. 290. 

 St. John and Worthen 1875 A, p. 432. 

 Thompson J. 1870 A. 



1871 A. 

 Traquair, R. H. 1884 B. 



1888 A, p. 81. 

 Woodward, A. S. 1884 A, p. 267. 



1891 A, p. 97. 



