420 A MANUAL OF AMERICAN LAND SHELLS. 



smaller and more rapidly tapering than S. octona, which has its colu- 

 mella somewhat truncated and has not as yet been found on this con- 

 tinent. 



This, according to Mr. Bland, is not the true S. suhula {q. v.). 



Stenogyra subiila, Pfr 



Shell subperforate, subulately turreted, delicately striated, shining, 

 transparent waxen ; whorls 8, rather convex, the last about equaling 

 Fig 473 two-sevenths of the length ; columella straight ; aperture 

 oval-oblong; peristome simple, acute, its right extremity 

 straight, its columellar extremity very slightly reflected, ap- 

 pressed. Length, Hi"'™; width, 3'""^. Of aperture: Length, 

 ;;■'"": width, 3^-"'"'. (Pfeiffer.) 



Stenogyra suhula, Pfeiffer, Mon., ii, 158. — W. G. Binney, T. M., v, 195. — 



Not of BiNNEY, &c. 



A West Indian species, introduced into the Southern Region 

 at Mobile. 



For jaw and dentition see ante, p. 423, Figs. 469, 470. (Plate IV, Fig. 

 P, b, of Terr. Moll., V, is an extreme marginal.) There are 24-1-24 

 teeth, with G perfect laterals. 



There were eggs in the oviduct of the Mobile individuals examined 

 by me. 



It must be borne in mind that this is not the shell described and fig- 

 ured under this name in Terr. Moll., II, and Land and Fresh-Water 

 Shells, I, which is S. octonoides, D'Orb. (See above.) 



Subgenus MELANIELLA, Pfr. 



Animal not observed. 



Sbell imperforate, ribbed, usually decussated, sculptured, brownish 

 horn-colored, rather solid; whorls 9, rather convex, graduated, the 

 three or four upper ones without ribs ; aperture effuse at base, ovate ; 

 columella constricted; peristome simple, subcontinuous. 



A West Indian subgenus. One species has been introduced into the 

 Florida Subregion. 



Steiiog:yra gracilliina, Pfr. 



Shell im])erforate, minute, elongated, very slender, thin, t)f a drab- 

 white color, ornamented with elevated, compressed, sharp, rather dis- 



