226 UROCOPTIS, S. G. GONGYLOSTOMA. 



Var. trinidadensis Pils., n. v. PI. 54, figs. 83, 84, 87. 



The specimens before me from the interior of Trinidad, 

 central Cuba, where Gundlach collected, are what Poey, 

 Arango and Pfeiffer (Malak. Bl., iv, p. 110) have identified 

 as lavalleana, but they seem to differ from the original de- 

 scription in sculpture, being either rather coarsely rib-striate 

 throughout, or with the striae partially effaced on the con- 

 vexity of each whorl, instead of being "very smooth," as 

 Orbigny states. The axis (pi. 54, fig. 87) is slender, encir- 

 cled by two larnellse, the upper one cord-like, rather heavy, 

 the lower lamella thinner, broader, finely serrate at the edge, 

 persisting in the penult, whorl, where the upper lamella is 

 obsolete. The shell is drawn out in a very long, slender 

 point in the young, according to Pfeiffer. The size varies 

 within wide limits. 



Length 21, diam. 4.5 mm. ; whorls 12. 



Length 17, diam. 4 mm. ; whorls 11. 



Length 13. diam. 3.5 mm. ; whorls 9. 



Pfeiffer seems to have examined the type of lavalleana in 

 the British Museum. This variety is one of the easternmost 

 species of its kind; but central Cuba has apparently been 

 very imperfectly explored for land shells. 



Group of U. angustior. 



Shell small. Axial lamella two, decidedly weaker than in 

 the preceding group. Sometimes a short, low third cord is 

 interpolated. 



98. U. DISTINCTA ('Gundl.' Arango). PI. 53, figs. 58, 63, 65; 



pi. 55, figs. 2, 9, 10, 11. 



Shell pale brownish-corneous, slightly swollen in the mid- 

 dle, coarsely striate, but the striae are low and rounded, 

 stronger on the early whorls, and on the base and neck of 

 the last whorl they become elevated and thread-like. Some- 

 times the striai are subobsolete on the cylindrical portion of 

 the shell, except near the sutures. The internal pillar has 

 two spiral lamella in the penultimate and preceding two 

 whorls, the lower lamella moderately strong, with rounded 



