4S8 PALiE ONTOLOGY OF ILLINOIS. 



Page. 



Physmiemus Chesterensis, St. J. and W., Chester, - - 455 



Drepanacanthus, 5". and W., 450 



— reversas, St. J. and "W., St. Louis, - - - - 456 

 Xystracanthus, Leidy, 457 



— mirabilis, St. J. and W., Coal Meas., - - 458 



— acinaciformis, St. J. and W., Goal Meas., - - - 459 

 Erismacanthus, McCoy, - - 461 



— McCoyanus, St. J. and YY, St. Louis, - - 461 

 Amacanfhus, St. J. and W., 4 64 



— gibbosus, (S. and W. sp.), St. Louis, - 404 

 Marracanthas, St. J. and W., - - 465 



— rectus, (N. and AY. sp.), St. Louis, .... 466 

 Batacanthus, St. J. and Y\ T ., 468 



— baculiformis, St. J. and "VY, Keokuk, - 469 



— stellatus, (N. and TT. sp.), Keokuk, - - - 470 

 6amj)sacanthus, St. J. and W., 471 



— typus, St. J. and W., St. Louis, .... 472 



— squamosus, St. J. and TY, St. Louis, - 473 



— ? latus, St. J. and YY, Keokuk, ... - 474 

 Lecracanthus, St. J. and W., 475 



— unguiculus, St. J. and W., St. Louis, - - - 476 

 Oracantlius, Agassiz, 477 



— ? obliquus, St. J. and YY, Keokuk, - - - 477 



— consimilis, St. J. and YV., St. Louis, - 478 

 Pnigeacanthus, St. J. and W., 480 



— deltoides, St. J. and W., Keokuk, .... 480 



