68 THE NAUTILUS. 



El Boqueron where reappears from underground the river Tatibonico 

 de Norte, in the eastern limits of the Santa Clara Province. 



This species resembles U. boqueronis but is easily distinguished 

 from it by the larger size, uniform color, the straighter riblets which 

 are also stronger and wider spaced. 



Urocoptis acicularis, n. sp. Plate vi, fig. 6. 



Cylindric-subulate, very slender, the upper third tapering to a 

 very narrow truncation or to a bulbous apex ; brownish with scat- 

 tered dark corneous streaks bordered with white patches. Sculpture, 

 delicate thread-like and wide-spaced riblets which are nearly straight 

 and slightly or not at all oblique. Whorls 25-28 in the entire shell, 

 14-lG in the truncate specimens, nearly flat, the last free in a curved 

 neck with a weak basal keel. Aperture subcircular, brownish in- 

 side, the peristome white, glossy, expanded and flatly reflexed. 

 Axis encircled by one spiral, denticulate or spinose, well-developed 

 lamella without a noticeable cord above it. 



Longitude 17, diameter 2, aperture diameter 2, whorls 27, 

 (entire). 



Longitude 14, diameter 2.1, whorls 15^, (entire). 



Longitude 15.2, diameter 2.3, whorls 15^, (entire). 



Central Cuba : On stones and walls at Chinchilla and the Mogotes 

 de las Tumaguas, near Sagiia la Grande in the Province of Santa 

 Clara. 



Characterized and distinguished from the others of the group 

 chiefly by its cylindric form and very slender shell. 



Urocoptis {Gongylostoma) camagueyana n. sp. PI. vi, figs. 12, 13. 



Fusiform-cylindric, more swollen above the middle and slowly 

 tapering to a wide truncation ; cream-colored or pale corneous, a 

 little darker below. Sculptured with very strong cord-like whitish 

 riblets which are in part hollow but rarely broken, more inflated 

 and closely spaced in the upper than in the lower whorls, where they 

 become degenerate, though again becoming somewhat lamellose on 

 the neck. The suture is denticulate by the projection of the ends of 

 the riblets. Whorls 7-9, somewhat convex, the last one free and 

 produced in a long, round, twisted neck. Aperture subcircular, 

 slightly oblique, the peristome whitish, expanded and a little re- 



