206 UROCOPT1S, S. G. GONGYLOSTOMA. 



spines. The upper and middle lamellae become obsolete in 

 the penult, whorl (pi. 51, fig. 24). 



Length 13, diam. 2.3 mm. ; whorls 20. 



Length 12.7, diam. 2 mm. ; whorls 19. 



Length 11.2, diam. 2 mm. ; whorls 18. 



Western Cuba : Sierra de Guira, at San Diego de los Banos 

 (Gundlach) ; Rangel and Mogotes de Galalon (Arango) ; San 

 Andres (Chas. Wright), all in prov. Pinar del Rio. 



Cyl. notata Gundlach mss., PFR., Malak. BL, xi, 1863, p. 10 ; 

 Monogr., vi, p. 372. ARANGO, Contrib., p. 116. CROSSE, J. 

 de C., 1890, p. 228. SOWERBY, Conch. Icon., pi. 11, f. 102. 



There is sometimes a pale brown band at the periphery and 

 following the suture, as noted in the original description; 

 but this is wanting in most of the individuals I have seen. 



It is smaller than U. saxosa and brunnescens, with more 

 whorls in the same length. The apex is either entire or nearly 

 so, and the striation of the neck, while becoming thread-like, 

 is not more spaced than on the spire. 



In some specimens the median lamella of the axis is want- 

 ing, the lower one with very delicate, thread-like white spines 

 (pi. 51, figs. 26, 27). I can see no other difference whatever 

 between these and the typical form. Figs. 15, 16, 17, 24 are 

 from S. Andres specimens ; figs. 26, 27 are from Rangel. 



77. U. SAXOSA (Poey). PI. 51, figs. 4-6, 20. 



Shell slightly rimate, frequently not rimate, cylindric- 

 turrete, entire, very rarely truncate, obliquely striate, glossy, 

 glassy and pale corneous. Spire attenuate above; suture 

 simple; whorls 23 in an entire specimen (16 in a truncated 

 shell), convex, the last free in front, closely costulate, com- 

 pressed near the rima, elsewhere cylindrical. Aperture ob- 

 lique, subcircular; peristome white, equally expanded and a 

 little reflexed throughout. Length 16, diam. 2% mm. (Poey). 



Western Cuba: Sierra del Rangel, on marble rocks (Poey, 

 Arango) ; Sierra del Rosario at San Cristobal (Cisneros), 

 and the coffee plantation of San Leon (Gundlach), all in 

 Pinar del Rio. 



Cyl. saxosa POEY, Memorias, ii, pp. 31, 61, pi. 3, f. 10, 11 



