UROCOPTIS, S. G. GONGYLOSTOMA. * 259 



Length 18, diam. 4 mm.; whorls 10% (Vinales). 



Length 19, diam. 4.5 mm.; whorls 10-12 (Pfr., types). 



Western Cuba: Isabel Maria, in district Pinar del Rio, 

 prov. P. del R. (Wright) ; Vinales (R. Arango). 



Cyl. violacea Wright mss., PFR., Malak. BL, xi, 1864, p. 128 ; 

 Monogr., vi, p. 367; Novit. Conch., p. 260, pi. 65, f. 10-12. 

 ARANGO, Contrib., p. 110; ^OWERBY, Conch. Icon., xx, pi. 7, 

 f. 60. 



Externally U. violacea is very like U. trilamellata, but the 

 pillar has only one well-developed lamella, the others being 

 very indistinct. The length of the neck varies a good deal. 

 Figs. 34, 35 are copied from Pfeiffer's; fig. 33 is from a 

 topotype; fig. 32 from a Vinales specimen. 



142. U. PLUMBEA ('Wright' Pfr.). PI. 57, figs. 36, 37, 38, 39. 

 Shell slender, pillar-shaped, narrowly truncate, moderately 



solid, purple-brown. Surface lustreless, sculptured with ob- 

 lique, arcuate, rather widely-spaced whitish riblets, generally 

 a little more spaced on the neck. Whorls convex, especially 

 the later ones; the last whorl free, the neck usually long, 

 sometimes rather short, grooved above. Aperture rounded, 

 dark within, the lip whitish, reflexed. Axis slender, sinuous 

 below, encircled with a thin, sub-basal spiral lamella (den- 

 ticulate in upper whorls), and a smaller lamella above it, 

 obsolete in the last two whorls. 



Length 19, diam. 2.5 mm. ; whorls 13. ) T 



T ^ ic j- T- i 101 / > Isabel Maria. 



Length 16, diam. 2.1 mm. ; whorls 12%. j 



Length 17-18, diam. 2.66 mm.; whorls 12 (Pfr., types). 



Western Cuba: Isabel Maria, in Pinar del Rio (Wright). 



Cyl. plumbea Wright mss., PFR.,, Malak. BL, xi, 1864, p. 

 129; Monogr., vi, p. 385; Novit. Conch., p. 262, pi. 65, f. 

 20-22. ARANGO.. Contrib., p. 125. 



Much more slender than violacea and trilamellata. U. 

 macra is very closely allied, but it is paler, usually retains 

 the apex, and has but one axial lamella. 



143. U. MACRA ('Wright' Pfr.). PI. 59, figs. 91, 92, 93. 

 Shell slightly subrimate, cylindric-subulate, rather thin, 



