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. 



Unfigured 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, Pfeifler. PL 10, fig. 49. 



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

 longitudinal curved chestnut lines. Length, 38 mill. 



Guatemala. 



Var. ft. Slightl} 7 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. 



