BOTHRIOPUPA. 229 



tooth. It differs from Gastrocopta, however, by the nearly 

 marginal and sub-basal position of the lower palatal plica, the 

 form of the peristome and the umbilical region, which are all 

 exactly as in Bothriopupa, and unlike Gastrocopta. 



2. BOTHRIOPUPA TENUIDENS (C. B. Adams). PI. 29, figs. 5-7, 

 11-13. 



Belated to P. ovata Say, and of the same size; aperture 

 with a large, lamellif orm tooth above, running inward ; below, 

 another similar but smaller one opposite ; two others, one on 

 each side, opposite (C. B. Ad.). 



The shell is ovate, rather obese, minutely perforate and 

 shortly rimate, cinnamon-colored, thin, composed of about 4% 

 rather convex whorls. The surface is irregularly, densely 

 pitted. The aperture is somewhat oblique, truncate-oval, the 

 peristome rather broadly expanded on the columellar and 

 basal margins, narrowly so on the outer margin, which is 

 straightened or a trifle incurved in the middle and strongly 

 arched in the upper part. In Jamaican specimens there is the 

 barely perceptible trace of an angular nodule, or none what- 

 ever, but in those from Cariaquita, Venezuela (figs. 11-13) 

 the angular is often very distinctly developed, in the typical 

 position, as shown in figs. 12, 13. The parietal lamella is 

 strong, high, and enters rather deeply ; it is somewhat curved, 

 the concavity towards the columella (fig. 6). The columel- 

 lar lamella is smaller, ascending slightly within, but nearly 

 horizontal. The two palatals are pliciform, the lower one 

 longer and more deeply placed. In quite old shells a very low 

 callous pad, which represents the basal plica, may be seen. 



Length 1.8, diam. above aperture 1.1 mm. ; 4% whorls. 



Length 1.6, diam. above aperture 1 mm. ; 4% whorls. 



Jamaica (Adams) : Bellevue (Gloyne) ; near Mandeville, 

 figs. 5, 7, and Somerset, Manchester (A. P. Brown). Cuba 

 (Sterki, as Vertigo variolosa). Venezuela: Cariaquita, figs. 

 11-13 (S. Brown). 



Pupa tenuidens C. B. AD., Proc. Boston Soc. Nat. Hist., 

 1845, p. 15. KUESTER, Syst. Conchyl. Cabinet, p. 137, pi. 17, 

 f. 25, 26. PFEIFFER, Monographia, iii, 555; iv, 680; vi, 327. 



