208 UROCOPTIS, S. G. GONGYLOSTOMA. 



the lower lamella rather distantly and subobsoletely den- 

 ticulate (pi. 48, fig. 13). 



Length 13, diam. 3 mm.; whorls 12. 



Length 11, diam. 2.5 mm. ; whorls 12. 



Cuba: Los Cayos de San Filipe, district of Vinales, prov. 

 Pinar del Rio (Chas. Wright). 



Near U. saxosa, from which it differs chiefly by the much 

 reduced median axial lamella. U. propinqua is somewhat 

 more finely striate, and has the three lamellae well developed 

 in the penult, whorl, while in U. oligomesus the upper two are 

 weak there. Some shells before me from Vinales, in which 

 the striation is nearly effaced except near the sutures, seem 

 to be referable to this species. 



80. U. BRUNNESCENS (' Gundl. ' Pfr.). PI. 51, figs. 1-3, 18. 



Shell cylindric below, the upper half or less tapering to a 

 narrow truncation or an entire apex ; broivnish-corneous, thin, 

 glossy, sculptured with fine ^and subobsolete but rather reg- 

 ular striae, becoming stronger, thread-like on the last whorl; 

 the intervals as wide as the striae. Whorls convex, the last 

 rounded beneath, without a carina, shortly free and descend- 

 ing in front. Aperture subcircular or obliquely rounded- 

 oval; peristome white, narrowly reflexed. Axis with three 

 lamellae, the upper one much the largest in the intermediate 

 whorls, lower lamella smallest, distantly spinose. In the 

 penult, whorl the three lamellae are subequal (fig. 18). 



Length 14.5, diam. 2.8 mm.; whorls 15 (truncate). 



Length 12, diam. 2.5 mm.; whorls 13 (truncate). 



Length 12.3, diam. 2.7 mm. ; whorls 17y 2 (apex entire). 



Length 13-14, diam. 2.5 mm.; whorls 15-19 (Pfr.). 



Western Cuba : Hato Caimito, near the Pan de Guajaybon, 

 Pinar del Rio, on stones (Gundlach, Wright). 



Cyl. brunnescens Gundl. mss., PFR., Malak. BL, xi, 1863, 

 p. 8, no. 53; Monogr., vi, p. 37-6. ARANGO, Contrib., p. 118. 

 SOWB., C. Icon., xx, pi. 10, f. 92. 



The figures are from topotypes. It scarcely differs from 

 U. saxosa externally, except by the brown tint ; but the three 

 lamellae are stronger and subequal in the penult, whorl, as in 

 U. propinqua. 



