622 



NORTH AMERICAN INDEX FOSSILS. 



Large, heavy, subglobose, slightly expanded aperturally, earlier 

 whorls as in preceding, final whorl carinate, with central depressed 

 band and another obscure ridge on each side. 



Coal measures of Pennsylvania, Ohio, Indiana, Illinois, Iowa, 

 and Missouri. 

 63. E. subpapillosus White. Carbonic. 



Like E. carbonaruts but larger and with last portion of final 



i 



Fig. 835. a-c, Euphemus carbonarius ; d, c, E. nodocarinatus. (After White, 



13th Ind.) 



whorl studded with slightly raised papillae in rows continuous with 

 the revolving ridges of preceding portion. 



Upper Carbonic of Utah (Upper Aubrey group), of Colorado 

 and Arizona. 



XXI. Bucanopsis Ulrich. 



Like Bellerophon, but surface cancellated by regular straight 

 revolving and transverse striae. Ordovicic-Permic. 



(A polyphyletic group, retained for the present.) 

 64. B. carinifera Ulrich. (Fig. 836.) Ordovicic. 



Fig. 836. Bucanopsis carinifera. (After Ulrich, Pal. Minn.) 



