[135] 

 10. Leucochila pellucida, Pfeiffer. 



Plate 15, figure above 24. 



Cylindrical, thin, shining, pellucid, apex obtuse ; whorl five, 

 convex, aperture semi-oval, five-toothed, one on the parietal 

 wall, one on the columella, two on the middle of the outer lip, 

 and a minute one on its base ; lip simple, expanded. Light 

 corneous. 



Length 2, diam. 1 mill. 



Texas ? 



This is a Cuban species, quoted from Texas by Roemer. It 

 may be doubted whether the specimens collected by this gentle- 

 man were really the same as the Cuban shell. 



STROPHIA. 

 1. Strophia incana, Binney. 



Plate 15, figure 19. 



Cylindrical, thick, opaque, apex obtuse ; whorls eight to 

 twelve, flattened, suture not deep ; more or less heavily striate, 

 sometimes almast smooth ; aperture small, rounded-oval, lip 

 white, thickened and reflected with a callus deposit bearing a 

 tooth on the parietal wall and on the columella ; base imper- 

 forate, carinate, with the striae well developed. White, with 

 sometimes irregular black flames or zig-zag markings. 



Length 25—31, diam. 10 mill. 



Florida and Cuba. 



This is the only representative in our country of a numerous 

 group of large species, inhabiting several West India Islands, 

 but attaining their greatest development in Cuba. 



VERTIGO. 

 1. Vertigo Bollesiana, Morse. 



Plate 15, figure 25. 



Ovate-cylindrical, apex obtuse ; whorls four, well rounded, 

 with impressed suture ; aperture sub-trigonal, with a curved 

 parietal tooth, two columellar teeth, the lower one the smallest, 

 and two transverse lamelliform teeth within the outer lip and at 

 its middle and base ; lip thickened and subreflected ; axis per- 

 forate. 



Length 1-7, diam. 9 mill. 

 ^ 18 



