1 139 ] 



vex ; the last carinate at base ; aperture rounded with continu- 

 ous, acute lip. Corneous. 



Length 15, diam. 4 mill. 



Florida. 



2. Gongylostoma jejuna, Gould. 



Plate 15, figure 28. 



Small, fusiformly elongate, solid, attenuate and truncated at 

 apex ; whorls about nine remaining, convex, with well impressed 

 suture, the last whorl carinate at base ; aperture campanulate, 

 the lip continuous and not in contact with preceding whorl. 

 Light horn color, with narrow longitudinal white lines. 



Length 10, diam. 2-5 mill. 



Florida. 



3. Gongylostoma Coahuilensis, W. G. Binney. 



Plate 15, figure 29. 



Cylindrical, ventricose, thin, apex conically obtuse ; whorls 

 twelve, the upper ones smooth, the middle ones striate, the last 

 two strongly ribbed, attenuated at base and not carinate ; aper- 

 ture subquadrate, with continuous peristome. White. 



Length 29, diam. 7, mill. 



Coahuila, Mexico. 



Genus HOLOSPIRA, Albers. 

 1. Holospira Roemeri, Pfeiflfer. 



Subcylindrical, apex obtusely conical, not truncate, substriate ; 

 whorls fourteen, flattened, the last carinate at the base, twisted 

 downwards and free from the preceding whorl ; the aperture 

 with narrowly expanded lip, which is continuous, with a plica 

 within. Pinkish white. 



Var. /?. smaller, more ventricose, whorls 12, the last less free. 

 Length 13 — 14, diam. 4-5 mill. 



New Braunfels, Texas. 



