

UROCOPTIS, S. G. GONGYLOSTOMA. 227 



ge, the upper lamella lower, but slightly stouter, cord-like. 

 The upper lamella diminishes upwards, hardly appearing 

 in the upper half of the shell, where the axis is straight, 

 encircled by a single compressed, denticulate . lamella. 



Length 12.6, diam. 3.3 mm.; whorls 10y 2 . 



Length 12, diam. 2.9 mm. ; whorls 11. 



Length 10.8, diam. 3 mm.; whorls 9y 2 . 



Western Cuba: Punta de la Jaula (type locality) and 



Itio Nuevo, Guane (Wright). 

 Cylindrella concreta Gundl., PFR., Novit. Conch., pi. 97, 

 12-15, but not the description. Cyl. distincta Gundl. mss., 

 ARANGO, An. Real Acad. Cien., etc., de la Habana, xii, p. 284, 

 no. 13 (1S76). 



Formerly confused with U. concreta, which is almost ex- 

 actly similar in external characters. Pfeiffer figured a speci- 

 men of distincta for concreta in the Novitates Conckologicae. 

 Probably Sowerby's figure of concreta is referable rather to 

 the present species. 



99. U. CONSANGUINEA (Arango). 



Differs from the preceding [difUcultosa] by the opaque 

 shell, last whorl carinate at the base, and internal column 

 provided with two weaker descending laminae. The number 

 of whorls and length of the sheU are as in the preceding 

 species (Arango). 



Cuba. 



Cyl. consanguinea ARANGO, Proc. A. N. S. Phila. 1882, 

 p. 107. 



100. U. CRISTALLINA ('Wright,' Pfr.). PI. 54, figs. 80, 81, 82. 

 Shell subrimate, cylindric below, the upper half or third 



tapering to a rather wide truncation; thin; transparent 

 whitish. Surface very glossy, smooth or narly so on the 

 median convexity of each of the whorls of the cylindrical 



>ortion of the shell, elsewhere regularly striate, the sutures 

 iely crenulated by the striae; base and neck of the last 



rhorl striate. WTiorls convex, the last shortly free in front. 



.perture round-oval, oblique, the peristome very narrowly 



