THE NACTILU3. 67 



Central Cuba : On stones at Lomas del Purio near Calabazar de 

 Sagua in the Province of Santa Clara. 



This species resembles U. xorighti Pfr. though it is less slender 

 and more strongly sculptured. 



TJroeoptis (^Gongylostoma^ boqueronis, n. sp. Plate vi, figs, 1, 2, 3. 



Slenderly fusiform, tapering to a narrow truncation above ; thin, 

 corneous with some indistinct darker streaks ; regularly sculptured 

 with narrow thread-like whitish riblets which are slightly arcuate, 

 somewhat oblique in the upper half, less so in the lower, and sep- 

 arated by intervals two or three times their width. Whorls 11-13, 

 a little convex, the last free and produced into a rather short neck. 

 Aperture subcircular, a little oblique, the peristome whitish, ex- 

 panded and somewhat reflexed. Axis encircled by one spiral 

 spinose lamella with a low spiral cord above it. 



Longitude 18.2, diameter 2.4, aperture diameter 2, whorls 13^. 



Central Cuba : On walls exposed to the sun at the entrance to El 

 Boqueron, an underground passage of the river Tatibonico del Norte 

 through the Sierra de Tatibonico, in the eastern limit of the Santa 

 Clara Province. 



This species differs from U. hacillaris and its varieties by its non- 

 sinuous but slightly arcuate riblets, more uniform color, less produced 

 neck, etc. 



Urocoptis {Gongylostoma) parallela, n. sp. Plate vi, figs. 4, 5. 



Slenderly fusiform, frequently entire, somewhat swollen in the 

 middle, tapering to a narrow truncation or to the bulbous apex : pale 

 brown in color; sculptured with strong wide-spaced riblets which are 

 nearly straight; whorls 26-28 (entire), 12-14 in the truncate 

 specimens, somewhat convex, the last one free and produced in a 

 long curved neck. Aperture subcircular, slightly or not at all obli- 

 que, peristome whitish, expanded and reflexed as in tlie other related 

 species. Axis encircled by one spiral spinose lamella and a well 

 developed spiral cord above it. 



Longitude 20, diameter 2.9, aperture diameter 2..o, whorls 26, 

 (entire). 



Longitude 1j.2, diameter 2.9, aperture diameter 2.0, whorls 13^, 

 (truncated). 



Central Cuba : On walls exposed to the sun at the north side of 



