698 



NORTH AMERICAN INDEX FOSSILS. 



310. CEcotraustes denticulata, c 



311. Macrocephalites epigonus, U, a 



312. Cardioceras cordiformis, U, b 



313. Perisphinctes machlachlani, U, a 



314. P. nikitini, TJ, a 



315. P. mazapilensis, TJ, a 



316. P. felixi, TJ, a 



317. P. virgulatiformis, c 



318. P. colfaxi, c 



320. Idoceras laxevolutum, TJ, a 



321. I. baldarum, TJ, a 



322. Aspidoceras cf. acanthicum, TJ, a 



323. A. bispinosum, TJ, a 



324. A. avellanoides, TJ, a 



325. A. alamitocensis, TJ, a 



329. Virgatites mexicanus, TJ, a 



330. Aulacostephanus zakatecanus, TJ, a 

 405. Belemnites densus, TJ, b 



OSTRACODA. 



*ii6. Cypris purbeckensis, TJ, b 



Crinoidea. 



202. Pentacrinus asteriscus, TJ, b c 



203. P. (Isocrinus) knighti, TJ, b 



CoMANCHic Faunas. 

 The following provinces are recognized : 



(a) Northern Gulf (including Alabama, Kansas, Oklahoma, 



etc.). 



(b) Mexico-Texas. 



(c) Northern Rocky Mountains and Canadian extensions. 



(d) Pacific. 



(e) Greenland and other arctic regions. 





Anthozoa. 



287c. 



130. 



Parasmylia austinensis, M, b 



288. 



131. 



P. texana, TJ, b 



289. 



132. 



Pleurocora coalescens, M, b 



290. 



133. 



Cladophyllia furcifera, M, b 



*29I. 



295. 





Brachiopoda. 



295a. 



287. 



Peregrinella whitneyi, d 



296. 



304. 



Kingena wacoensis, TJ, b, d 



297. 

 327- 





Pelecypoda. 



328. 



2. 



Solemya occidentalis, d 



*329. 

 365. 



*i07. 



Nemodon vancouverensis, d 



206. 



Gervilliopsis invaginata, TJ, b 



366. 



257. 



Aucella crassicollis, d 



=^367. 



258. 



A. piochii, d 



374- 



258a. 



A. piochii var. ovata, d 



*393- 



260. 



Ostrea crenulimargo, b 



397. 



261. 



0. subovata, M, TJ, a, b 



399. 



262. 



0. quadriplicata, TJ, a, b 



435- 



286. 



Gryphaea marcoui, M, b 



462. 



287. 



G. corrugata, TJ, a, b 





287a. 



var, hilli, TJ, a 



491. 



287b. 



var. tucumcarii, TJ, a, b 



497. 



var. belviderensis, TJ, a, b 



G. navia, TJ, a, b 

 G. washitaensis, TJ, b 

 G. mucronatus, TJ, b 

 G. vesicularis, TJ, b 

 Exogyra texana, b 



var. weatherfordensis, L, b 



E. plexa, M, TJ, b 



E. arietina, TJ, b 



Trigonia taffi, L, b 



T. emoryi, M, TJ, a, b 



T. equistriata, TJ, d 



Pecten texanus, M, TJ, b 



P. roemeri, TJ, b 



P. quinquecostatus, TJ, b 



P. complexicosta, L, d 



P. operculiformis, TJ, d 



Plicatula dentonensis, TJ, b 



Lima wacoensis, M, TJ, b 



Modiola major, d 



Pholadomya sancti-sabse, M, TJ, 



a, b 

 Arctica occidentalis, d 

 Astarte carlottensis, d 



