44 STREPTOSTYLA. 



S. BOTTERIANA, Crosse and Fischer. PI. 11, fig. 95. 



Spire gradate, each whorl having a narrow sloping shoulder, 

 bounded by an angle ; body-whorl widely compressed in the 

 middle ; longitudinally plicate-striate ; tawny chestnut. 



Length, 8*5 mill. 



Orizaba, Mexico. 

 Distinguished at once by its peculiar form. 



Un figured Species. 

 S. MOHRIANA, Pfr. Orizaba, Mexico. 



S. DUBIA, Pfr. Chiapa, Mexico. 



Pfeiffer, in his " Nomenclator," considers both of these doubtful 



species. 



Section CHERSOMITRA, Martens. 



S. DELATTREI, Pfeiffer. PL 10, fig. 49. 



Rather solid, smooth, shining; fulvous, with irregular distant 



longitudinal curved chestnut lines. Length, 38 mill. 



Guatemala. 



Yar. ft. Slightly smaller, with more numerous chestnut streaks. 



S. QUIROZI, Strebel. PI. 11, fig. 92. 



Rather solid, opaque, shining, smooth, yellowish chestnut- 

 color, with a small sutural yellowish white band. 



Mexico. 



Smaller-sized than S. Delattrei, with shorter spire and a little 

 more prominent rounded shoulder, darker-colored, and without 

 chestnut strigations. 



S. SHUTTLEWORTHI, Pfeiffer. PL 10, figs. 52, 53. 



Thin, smooth, shining, with irregular impressed lines, suture 

 sublacerated ; yellowish brown, with variciform occasional chest- 

 nut streaks. Length, 33 mill. 



Cordova and Chiapa, Mexico. 



I figure, in addition to the type form, a more ventricose, darker- 

 colored variety (fig. 53). 



S. SALLEI, Crosse and Fischer. PL 10, fig. 50. 



Rather thin, shining, obsoletely striulate; suture lacerated; 

 olivaceous, with variciform light luteous strigations and macula. 



tions, aperture grayish white. Length, 40 mill. 



Orizaba, Mexico. 



