GASTROCOPTA, NORTH AMERICA, WEST INDIES. 75 



later volumes of the Monographia Heliceomm, defining it 

 thus : ' ' A little larger, with a few teeth, sometimes almost en- 

 tirely obsolete." Kiister described a specimen from Pfeiffer's 

 collection as having five teeth, in the typical Gastrocopta 

 positions. His figure shows teeth as large as in G. serviUs, 

 and probably what he had was that species. It may be sur- 

 mised that Pfeiffer had the form deficient in teeth mixed with 

 servUis; or, indeed, his- original description might have been 

 from an immature specimen of either. 



22. GASTROCOPTA PELLUCIDA (Pfeiffer). PL 15, figs. 1-3, 5. 



"The shell is small, cylindric, subperf orate, pellucid, 

 glossy, pale yellowish, most minutely striate, the apex rather 

 obtuse ; whorls 5%, a little convex ; aperture oblong, toothed ; 

 two large teeth on the columella, 3 or 4 very minute teeth in 

 the circuit, not reaching to the edge ; peristome simple, a little 

 reflected. Length %, diam. % of a line [=1.66:0.83 mm.]. 

 Cuba" (P/r., 1841). 



* * The shell is subperf orate, cylindric, thin, pellucid, glossy, 

 pale yellowish ; spire gradually tapering, apex obtuse ; whorls 

 5, convex, the last one flatter than the preceding; aperture 

 semi-oval, fivfe-toothed: single strong teeth on the parietal 

 wall and the columella, two of moderate size in the right 

 margin, and a fifth small one in the base of the palate ; peri- 

 stome simple, the right margin expanded, columellar margin 

 reflected. Length 2, diam. scarcely 1 mm. ; aperture scarcely 

 % mm. long. Sometimes there is a fourth palatal denticle" 

 (Pfr., 1848). 



West Indies: Bahamas, Cuba, Jamaica, Haiti, Porto Rico, 

 Vieques, and eastern Mexico; varieties hordecella and parvi- 

 dens in the southern United States. 



Pupa pellucida PFR., Symbolse ad Hist. Hel., i, 1841, p. 46 ; 

 Monographia Hel. Viv., ii, 1848, p. 360 ; vi, p. 331. KUESTER, 

 Syst. Conchyl. Cab., p. 89, pi. 12, f. 24, 25, 25*. VON MAR- 

 TENS, Biologia Centrali- Americana, p. 328 (in part). Pupa 

 jamaicensis C. B. ADAMS, Contributions to Conchology, no. 

 3, p. 37. GLOYNE, Journ. de Conchyl., 1875, p. 121. PFEIF- 

 FER, Mon. Hel. Viv., iii, p. 558. KUESTER, Syst. Conchyl. 



