GASTROPODA— EU0MPHALID2E. 



66 1 



strongly concave, outer margin angulated, lower with row of blunt 

 nodes. 



Coal measures of Illinois, Iowa, Missouri, and Arizona. 

 183. E. catilloides Conrad. (E. subrugosus M. and W.) (Fig. 



912.) Carbonic. 



Fig. 911. Euomphalus pemodosus, upper side, profile and under side, X 2 /z- (After 

 Meek and Worthen, Geol. 111., V.) 



Rather small, strongly carinate both above and below, carinas 

 subrugose ; base rounder, wider than shoulder ; outer portion of 

 whorl depressed below carina. 



Coal measures of Indiana, Illinois, Iowa, Kansas, Missouri, 

 Nebraska, Eureka district; Nevada. 



Fig. 912. Euomphalus catilloides. (After White, 13th Ind. Rep.) 



184. E, subquadratus M. and W. (Fig. 913.) Carbonic. 



Up to an inch or more in diameter ; upper carina strong, nodose ; 



FlG. 913. Euomphalus subquadratus. (After Meek and Worthen, 111. Geol., V.) 



