1899.] NATUKAL SCIENCES OF PHILADELPHIA. 79 



lips thickened, having about 40 ridges, owing to nearly all of the 

 revolving ridges becoming a uniform size. Length 16 mm,, 

 greatest diani. 10 mm. 



One specimen collected by tlie writer from the Lower Claiborne 

 at Smithville, Bastrop Co., Texas. 



Ovula (Simnia) texana n. sp. 



Shell narrow, attenuate (anterior part of the shell wanting), re- 

 sembling in form the recent acicularis Lam. of the "West Indies ; 

 dorsal surface of the attenuated portion of the posterior, Avith fine 

 revolving lines, the remainder of the shell smooth ; outer lip thick- 

 ened, showing a few crenulations toward the anterior, inner lip 

 smooth with a raised callus at the posterior, on which are three or 

 four transverse grooves. Length 11 mm. (its original length was 

 probably about 14 mm.), greatest diam. 4 nun. 



One specimen collected by the writer from the Lower Claiborne 

 at " Alabama Bluff," Trinity river, Houston Co., Texas, 

 Ovula (Simnia) subtruncata n. sp. 



Shell elongate, subtruncate, resembling somewhat tiie recent 0. 

 uniplicata Sowerby, of Florida. Smooth with numerous fine revol- 

 ving lines around the angular or subtruncated posterior, posterior 

 canal extending beyond the truncated portion forming a deep 

 excavation, lip thin, but in a more adult specimen would probably 

 be much thicker. Length 1 5 mm, , gi-eatest diara. 4^ mm. 



One specimen collected by the writer from the Lower Claiborne, 

 at Hammetts Branch, near Mt. Lebanon, La. 



Eimella rugostoma n. sp. Plate II, fig. 10. 



Shell subfusiform, whorls eight, slightly convex, the two apical 

 Avhorls smooth, the others beautifully reticulated as follow: The 

 three spiral whorls below the smooth apical whorls, have seven equi- 

 distant, flat, revolving ridges, which are crossed by small inter- 

 rupted longitudinal ribs, obsolete on the upper of the three whorls. 

 The body whorl above the periphery and the first and second spiral 

 whorls have revolving ridges that are divided by a small groove 

 into five pairs, on the body wdiorl below the periphery are twenty 

 single revolving ridges, which become gradually small toward the 

 base, just above the suture one of the single revolving ridges is 

 also exposed on the first and second spiral whorls; longitudinal ribs 

 prominent, about twenty to each whorl, becoming nodulose where 



