264 PALEONTOLOGY OF ILLINOIS. 



ICHTHYODORULITES. 



PAGE. 



CTENACANTHUS, Agassiz, - - 233 



Coxianus, St. J. and W., Keokuk, 233 



deflexus, St. J. and W., St. Louis, - - 234 



Harrisoni, St. J. and W., St. Louis, - 236 



Fcllensis, St. J. and W., St. Louis, - - 237 



(jracillimus, N. and W., St. Louis, 238 



cannaliratug, St. J. and W., Chester, -_ 239 



Buttersi, St. J, and W., Coal Measures, 240 



AcoNDYLACANTHUs, St. John and Worthen, - 241 



rectus, St. J. and W., U. Coal Measures, 241 



nuperus, St. J. and W., Coal Measures, - - 242 



? Mudf/ianus, St. J. and W., Coal Measures, 244 



? xiphias, St. J. and W., Keokuk, - - 244 



EUNEMACANTHUS, St. John and Worthen, 246 



costatus, (N. and W. sp.), St. Louis, - 246 



ASTEROPTYCHIUS, Agassiz, 248 



tencllas, St. J. and W., U. Coal Measures, - 248 



GLYMMATACANTHUS, St. John and Worthen, - 249 



rudis, St. J. and W., Keokuk, - - 249 



peirodoides, St. J. and W., Chester, 250 



GYRACANTHUS, Agassiz, - 251 



? cordatus, St. J. and W., Keokuk, 251 



PHYSONEMUS, Agassiz, - 252 



fakatus, St. J. and W., St. Louis, 252 



DEEPAN ACANTHUS, Newberry and Worthen, - - 253 



reversus, St. J. and W., St. Louis, 253 



BATACANTHUS, St. John and Worthen, - 253 



? necis, St. J. and W., Keokuk, . 253 



ORACANTHUS, Agassiz, . - 255 



vetustus, Leidy, St. Louis, - 255 



rectus, St. J. and W., Chester, - - 257 



PNIGEACANTHUS, St. John and Worthen, 259 



trigonalis, St. J. and W., St. Louis, - 259 



