GASTROPODA— SUBULITIDM. 



699 



305. M. inornata M. and W. Carbonic. 

 Shorter and somewhat broader than the preceding, sutures less 



deeply impressed, body whorl nearly two thirds the length of the 

 shell. 



Coal measures of Illinois, Ohio, Missouri, and Arkansas. 



LXXXVII. Bulimorpha Whitfield. 

 Like Meekospira, but with more convex volutions, base of aper- 

 ture acute and notched ; outer lip with slight notch at suture. 

 Mississippic-Carbonic. 



306. B. bulimiformis (Hall). (Fig. 1004.) Mississippi. 



FlG. 1004. Bulimorpha bulimifor- 

 mis. (After Whitfield, Am. Mus. Nat. 

 Hist. Bull.) 



Fig. 1005. Bulimorpha minuta (a), 

 X 4 5 b-, body whorl greatly enlarged. 

 (After Meek and Worthen, 111., V.) 



Small, spire nearly half the length of the shell, volutions con- 

 vex, suture impressed, surface smooth. 



St. Louis (Spergen) of Indiana and Missouri. 



307. B. minuta (Stevens). (Fig. 1005.) Carbonic. 

 Minute, with distinct flat but narrow sutural shelf. 



Coal measures of Illinois, Iowa, etc. 



LXXXVIII. Soleniscus M. and W. 

 Like Bulimorpha, but with base produced into a short, straight 

 canal, and with a more or less distinct columellar fold. Carbonic. 



308. S. typicus M. and W. (Fig. 1006, a, b.) Carbonic. 

 Small, slender, acute spire, base much produced, last whorl 



nearly three fourths length of shell ; fold strong within. 

 Coal measures of Illinois and Missouri. 



309. S. fusiformis Hall. (Fig. 1006, c, d.) Carbonic. 

 Whorls regularly enlarging, spire more than half length of 



shell ; columellar fold broad and low externally ; inner lip with 

 strong callus. 



