INDEX TO SECTION II. 4S5 



Pack. 



Periplectrodus expansus, St. J. aud W., Chester, - - - 327 



Stemmatodus, St. J. and W., 328 



— cheiriformis, St. J. and W., U. Burlington, - - 330 



— bifurcatns, fvar. ?) St, J. and W., TJ. Burlington, - 330 



— bicristatus, fvar. ?J St. J. and W., U. Burlington, - 331 



— simplex, fvar. ?J St. J. and W., U. Burlington, - - 332 



— symmetricus, St. J. and W., U. Burlington, - - 333 



— Keokuk, St. J. and W., Keokuk, 334 



— compactus, St. J. and W., Chester, - - - 33-1 



PETALODONTS : 



Desmiodus, St. J. and SY., - - - - - - - - 337 



— tumi&us, St. J. and "W., St. Louis, ... - 339 



— costelliferus, St. J. and W., St. Louis, • - .341 



— Ugoniformis, St. J. and W., Keokuk, - - - 342 



— fflabellum, St. J. aud W., Keokuk, - . - - - 343 

 Tenustodus, St. J and W., 344 



— variabilis, St. J. and W., TJ. Burlington, - - - 346 



— robustvs, St. J. and W., U. Burlington, - - - 345 



— tenuicristatus, St. J. and W., Keokuk, - - - 348 



— Leidyi, St. J. aud W., St. Louis, ... - - 350 



— argutus, St. J. and W., Chester, .... 352 

 Harpacodus, Agassiz, - - - 354 



— occidentalis, St. J. and W., St. Louis, -' - - 355 



— compactus, St. J. and W., Chester, • - - 355 

 Chomatodas, Agassiz, 356 



— compttis, St. J. and W., TJ. Burlington, - - 356 



— parallehis, St. J. and W., Warsaw, .... 358 



— incrassatus, St. J. and TY T ., St. Louis, - - - 359 



— inconstans, St. J. and W., St. Louis, - - - - 360 

 Lisgodus, St. J. and W., 363 



— eurtus, St. J. and W., TJ. Burlington, - - - 364 



— serratus, St, J. and W., TJ. Burlington, - - 365 



— selluliformis, St. J. and W., St. Louis, - - 366 

 Tanaodvs, St. J. and W., 367 



— subltinatus, St, J. and W., St. Louis, - - - - 368 



— pumilus, St. J. and W., St. Louis, .... 369 



— prcenuntius, St. J. and W., St. Louis, - - - 371 



— sculptus, St. J. and W., St. Louis, - - - 373 



— grossiplicatus, St, J. and W., Chester, - - 375 



— iellicinctus, St. J. and W., Chester, - - - 376 



— depressus, St. J. and W., Chester, - 378 



