GASTROPODA— PLEUROTOMARIIDM. 647 



138. G. capillaria (Conrad). (Fig. 882.) Devonic. 

 Turreted, with deep suture, 2-3 strong spirals above the con- 

 cave band, which is also bound by spirals ; aperture subrhomboidaL 



Hamilton of New York. 



XLIII. Bembexia Oehlert. 

 Depressed subconical shells with angular volutions and concave r 

 vertical or oblique band, situated on the periphery, with a slit about 

 one fourth volution in length ; surface strongly striate. Devonic— 

 Mississippic. 



139. B. sulcomarginata (Conrad). (Fig. 883.) 



Devonic-Mississippic. 

 Moderately high-spired ; volutions embracing to base of band ; 



A 



Fig. 883. Bembexia sulcomarginata. (After Hall.) 



shoulder with two revolving ridges, one below the suture and one 

 near periphery ; growth lines strong, regular, even, and lamellose. 

 Suture often canaliculate ; body rounded, with a faint carina below 

 the band. 



Hamilton of New York, Maryland, Virginia, and Falls of the 

 Ohio ; Bedford and Berea of Ohio. 



XLIV. Euconospira Ulrich. 



Almost regularly conical shell with nearly flat (concave or 

 slightly convex) base, with flat shoulder, except in the young ; slit 

 covers from a third to a fourth of the last volution, with concave 

 band between sharply elevated lines ; fine spirals on the later 

 whorls. Mississippic-Carbonic. 

 140. E. turbiniformis M. and W. (Fig. 884, a, b.) Carbonic. 



With slightly convex base and small umbilicus bordered by ob- 

 scure ridge ; surface cancellated by fine spirals and oblique growth 

 lines. 



