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SITY 



id 





UROCOPTIS, S. G. GONGYLOSTOMA. 259 



Length 18, diam. 4 mm.; whorls 10y 2 (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. SOWERBY, 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.). PL 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. ) 



Length 16, diam. 2.1 mm. ; whorls 12V2- j 



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



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



Cyl. plumb ea Wright mss., PFR V 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 



tapex, and has but one axial lamella. 

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

 .hell slightly subrimate, cylindric-subulate, rather thin, 



