48 STREPTOSTYLA. 



S. SCHNEIDERI, Strebel. PL 10, fig. 73. 



Shell solid, nearly opaque, polished ; yellowish horn-color to 

 light ochre-yellowish, with a few slightly darker strigations ; 

 surface covered with irregular, slight striae, becoming more rib- 

 like at the sutures, where there is a translucent band, defined on 

 the last whorl by a slight groove. Length, 21-25 mill. 



Coban, Guatemala. 

 Nearly allied to the preceding species. 



S. VIRIDULA, Angas. PI. 27, fig. 8. 



Thin, shining, longitudinally striate on the upper part of the 

 whorls, the striae becoming almost obsolete on the lower half of 

 the body-whorl ; suture subcanaliculate ; pale yellowish green. 



Length, 16 mill. 



Costa Rica. 

 S. BOYERTANA, Crosse and Fischer. PL 10, fig. 67. 



Moderately solid, shining, pellucid, smooth ; light olivaceous 

 brown, the suture with an inconspicuous yellowish line. 



Length, 14 mill. 



Orizaba, Mexico. 

 S. CYLINDRACEA, Pfeiffer. PL 11, fig. 98. 



Smooth, shining; yellowish brown, the linear suture white 

 margined. Length, 13 mill. 



Tortilla^ Cent. Am. ; Merida, Yucatan. 

 S. ventricosula, Morelet (from the latter locality), is a synonym. 



S. DYSONI, Pfeiffer. PL 11, fig. 75. 



Thin, smooth, pellucid, shining; yellowish brown. 



Length, 9*5 mill. Honduras. 



Yer}- closely allied to the preceding species. 



S. CORNEA, Crosse and Fischer. PL 11, fig. 88. 



Thin, smooth, pellucid, shining; olivaceous horn-colored. 



Length, 14 mill. 



Guatemala. 



Not quite so cylindrical in form as the preceding species; yet 

 probably only a variety of it. 



S. FLAVESCENS, Shuttleworth. PL 11, fig. 76. 



Thin, somewhat shining, obsoletely striulate, with slightly 

 crenulated sutures ; corneous white, with remote yellowish brown 

 strigations. Length, 16 mill. 



Cordova, Mexico. 



