STREPTOSTYLA. 49 



S/LYMNEIFORMIS, Shuttleworth. PL 11, fig. 77. 



Thin, striulate ; light brownish } r ellow, with darker narrow 



strigations. Length, 17 mill. 



Cordova, Mexico. 

 S. AURTCULACEA, Pfeiflfer. PI. 11, fig. 82. 



Rather thin, smooth, pellucid, shining, suture margined ; red- 

 dish horn-color. Length, 16 mill. 



Cordova, Mexico. 



S. SARGI, Crosse and Fischer. PI. 11, figs. 78, 79. 



Moderately solid, or thin, rather smooth, shining; light oliva- 

 ceous horn-color, suture white-margined ; interior bluish white. 



Length, 13*5 mill. 



Guatemala. 



Yar. ft. Major. Lighter-colored, with fulvous strigations. 

 Length, 14*5 mill. 



S. PHYSODES, Shuttleworth. PI. 11, fig. 89. 



Moderately solid, smooth, shining; suture margined; light 

 yellowish brown. Length, 13 mill. 



Cordova and Chiapa, Mexico. 

 Var. ft. Pallida. Length, 17 mill. 



S. VEXANS, Strebel. PL 11, fig. 96. 



Moderately solid, translucent ; bright yellowish brown, with a 

 broad transparent zone at the suture, partly defined by a groove. 



Length, 8'7 mill. 



Mexico. 

 S. CUBANIANA, Orb. PL 11, fig. 80. 



Rather thin, smoothish, diaphanous, shining ; yellowish brown, 

 with subregular distant chestnut lines ; suture simple. 



Length, 28 mill. Cuba. 



S. EPISCOPALTS, Morelet. PL 11, fig. 90. 



Moderately solid, longitudinally costulate-striate above, suture 

 smooth, submarginate ; yellowish brown, shining. 



Length, 23 mill. Cuba. 



S. MORELETIANA, PfY. PL 11, fig. 91. 



Moderately solid, smooth, shining, suture distinctly margined ; 



corneous white. Length, 18 mill. 



Cuba. 



