46 THE NAUTILUS. 



gleam ; striation coarser. Whorls 9 to 10, somewhat convex. Axis- 

 encircled by two compressed lamellaj, the lower more expanded than 

 in the type. 



Length 17, diam. 4.8, aperture, 3.5, Whorls 10. 



Length 16, diam. 4, aperture 3.2. Whorls 9. 



Length 16, diam. 4.5, aperture 3.5. Whorls 9. 



Central Cuba; Coqueron del Jatibonico at the boundary between 

 the Provinces of Santa Clara and Camaguay. 



Some specimens show faint traces of white maculations. 



Urocoptis (Gongylostoma) cioNiscus, n. sp. 



Shell rimate, cylindric, the upper fourth tapering to a rather wide 

 truncation ; somewhat solid ; ashen with occasional brown streaks ; 

 sculptured with narrow oblique riblets separated by much wider in- 

 tervals ; suture simple. Whorls 9 to 11, somewhat convex, the last 

 shortly free with an obsolete cord-like keel around the base. Aper- 

 ture sub-circular, pale brown within, the peristome shining white, 

 expanded and reflexed ; columella with a distinct fold deep within. 

 Axis bearing two lamellae, the lower one somewhat the larger,, 

 denticulate above the middle and extending to the last whorl, the 

 upper disappearing in the penultimate whorl. 



Long. 26, diam. 5, apert. 5.2. Whorls 11. 



Long. 24, diam. 5.2, apert. 5.3. Whorls 9. 



Long. 25, diam. 5.2, apert. 5.3. Whorls 10.5. 



Central Cuba ; Cueva del Muerto, Sierra de Meneses in the dis- 

 trict of Yaguajay, Province of Santa Clara. 



Differs from U. vignalensis by its more cylindric and less tapering 

 shell, the brown streaks, absence of granules along the sutures, and 

 the axis encircled by two (not three) compressed and wider lamellae. 

 (Described from dead specimens). 



Urocoptis (Gongylostoma) transitoria, n. sp. 



Shell rimate, cylindric, the upper half or third tapering to a nar- 

 row truncation ; thin ; corneous-brown, with occasional stripes of a 

 deeper brown irregularly spread. Surface lusterless, sculptured with 

 narrow riblets separated by wider intervals. Whorls 9.5 to 11, a 

 little convex, the last slightly darker and free in front, rounded 

 below with an obsolete cord around the base. Aperture sub-circular, 

 a little narrower above, brown within ; columella, upper wall and 



