232 UROCOPTIS, S. G. GONGYLOSTOMA. 



spiral thread or cord, which makes it difficult to tell, in some 

 cases, whether a specimen is to be considered to have one or 

 two axial spirals 



107. U. MACHOI (Arango). 



Shell cylindric-turrete, truncate, thin, obliquely delicately 

 and closely striate, glossy, whitish. Whorls 10 to 11, a little 

 convex, the last sculptured with more widely spaced riblets. 

 Suture deep, simple. Aperture subcircular, the peristome 

 simple, white. Internal column twisted with a single thread. 

 Length 12, diam. 3 mm. (Arango) . 



Western Cuba: Canasi, near Matanzas. 



Cyl. machoi ARANGO, Anales de la Real Acad. de Ciencias 

 Med., Fis. y Nat. de la Habana, xii, p. 282 (1876) ; Contrib., 

 p. 113. 



At first sight it looks like a small variety of C. elegans, 

 but the internal pillar differs widely (Arango). 



108. U. GARCIANA ('Wright' Presas). PL 58, figs. 67, 68. 

 Shell subcylindric-fusiform, somewhat swollen in the mid- 

 dle, tapering above, truncate; thin, corneous, lustreless. 

 Surface sculptured with narrow, widely spaced riblets, 28 

 to 30 on a whorl, becoming crowded on the latter part of the 

 last whorl. Whorls convex, the last shortly free, rounded 

 beneath. Aperture subcircular, the lip white, thickened and 

 expanded. Axis a little sinuous, being encircled by a low, 

 spiral cord, which in some upper whorls is more or less den- 

 ticulate (pi. 64, fig. 12). 



Length 11, diam. 3.3 mm. ; whorls 9. 



Length 10, diam. 2.6 mm.; whorls 8%. 



Length 11 to 12, diam. 3 mm. ; whorls 9, in an entire speci- 

 men 15 (Presas). 



Western Cuba: Palmasola, near Matanzas (Wright); 

 Camarioca (Gundlach). 



Cyl. garciana Wright mss., PRESAS, in Poey's Repertorio 

 fisico-natural de la isla de Cuba, i, pt. 8, p. 220 (November, 

 1865). PFR., Malak. BL, xiii, 1866, p. 62; Monogr., vi, p. 374. 

 ARANGO, Contrib., p. 117. Not C. garciana SOWERBY, C. 

 Icon., xx, pi. 8, f. 66. 



