UROCOPTIS, S. G. GONGYLOSTOMA. 191 



expansion of the lower one somewhat less extensive, being 

 both shorter and less broadly dilated. The pale, waxen color 

 is a further distinction. There is the usual rather wide vari- 

 ation in size, but the other characters seem fairly constant in 

 over twenty-five specimens examined. 



60. U. TENERIENSIS ('Wright' Pfr.). PI. 52, figs. 31, 35, 36. 



Shell cylindrical, the upper third or less rather rapidly 

 tapering to a somewhat narrow truncation; rather solid; 

 corneous clouded with white. Surface lustreless, sculptured 

 with fine, whitish, oblique rib-striae much narrower than the 

 intervals, and with a subsutural series of small ivhite nodules 

 crenulating the suture. Whorls but slightly convex, the last 

 produced forward and descending in a rather long, round, 

 contracted neck. Aperture subcircular, the peristome thick- 

 ened, white, rather broadly reflexed. Axis with two sub- 

 equal spiral lamellae in the whorls above the middle, the upper 

 lamella running to the last whorl, the lower lamella expand- 

 ing in the antepenult, and next earlier whorls in a broad, 

 saucer-shaped plate, about two whorls long. 



Length 12, diam. 2.4 mm. ; whorls 12. 



Whorls 12.5, diam. 2.66 mm.; whorls 12-14 (Pfr.). 



Western Cuba : The hacienda La Teneria, near Guane, Pinar 

 del Rio (Wright) . 



Cyl. teneriensis Wright mss., PFR., Malak. Bl., xii, 1865, 

 p. 121; Monogr., vi, p. 387. ARANGO in Poey, Repert., ii, 

 p. 270; Contrib., p. 126. SOWERBY, Conch. Icon., xx, pi. 10, 

 f. 84. CROSSE, J. de C., 1890, p. 240. ? "C. finerice Wright, 1 ' 

 SCHAUFUS, in Paetel's Catal., p. 68. 



A very distinct little species, notable for its variegated 

 coloration, subsutural crenation, long neck and the long in- 

 ternal saucer-shaped spiral lamella. There is merely a slight 

 trace of the basal keel. In color it reminds one of the varie- 

 gated forms of the group of U. coerulans. 



Section Pycnoptychia Pils. & Van., 1898. 

 P. & V., Proc. A. N. S. Phila. 1898, pp. 271, 275. Type 

 U. humboldtiana Pfr. 



