GASTROCOPTA, NORTH AMERICA, WEST INDIES. 73 



parietal is typically not distinct (but in some forms there is a 

 very small projection on the columellar side). Columellar 

 lamella enters horizontally and is without accessory denticles 

 or callous deposit within. The basal and upper palatal plica? 

 are small tubercles, but the lower palatal is somewhat length- 

 ened and a little more deeply placed. The shell drawn in 

 figs. 5 and 6 measures, length 2.45, diam. nearly 1.1 mm. 



Like some other Gastrocoptas, there is a rather wide range 

 of individual variation in size. An extremely short, conic 

 form from Somerset, Bermuda, is drawn in pi. 14, fig. 7; 

 length 2, diam. 1.1 mm. I have seen several examples, but as 

 they were picked out of normal lots, it is not likely that they 

 represent a race. 



The specimens from Porto Rico, St. Thomas (pi. 14, fig. 4), 

 Guadeloupe and some others have the inner end of the angu- 

 lar lamella more prominent, forming a distinct spur in a front 

 view. Part of the Mexican shells are similar. 



To the localities given above for this species, all verified by 

 myself, Guatemala might perhaps be added, as Professor von 

 Martens gave several places in that country for "P. pellu- 

 cida, ' ' with which he unites servUis. 



Pupa desiderata "Weinland. PL 14, fig. 10. Shell broadly 

 and deeply rimate, ovate-cylindric, corneous, thin, slightly 

 obliquely striate under a strong lens ; spire moderately taper- 

 ing, the apex obtuse ; suture rather impressed ; whorls 5, con- 

 vex, the last shorter than the spire; aperture subvertical, 

 truncate-ovate, obstructed by a long parietal and another 

 smaller and more deeply placed palatal tooth, opposite to the 

 parietal; peristome corneous, thickened, expanded through- 

 out, the right margin somewhat sinuous, right and basal mar- 

 gins a very little reflected. Length 2*4, diam. above the 

 middle 1 mm. 



Gonave Island, off Haiti, under stones (Dr. Brown), a 

 single specimen in the Bland collection. 



Pupa desiderata WEINLAND, Jahrbucher der Deutschen 

 Malak. Ges., vii, 1880, p. 377, fig. in text. 



It may be suspected that Pupa desiderata is either a small 

 bleached B. servUis or a form of B. pellucida. Both of these 



