THE NAUTILUS. 57 



Longitude 15, diameter 2.9. 

 Longitude 12, diameter 2.3. 

 Longitude 13, diameter 2.5. 



Central Cuba: Under stones at the sides of the road between 

 Remedies and Taguayabon in the Province of Santa Clara. 



Urocoptis {Gongylostoma) pallidula n. sp. Plate vi, figs. 18, 19, 20. 



Belonging to the cinerea and livida group, it diflFers in its sculp- 

 ture and color; the surface is obliquely subarcuately striate, the 

 delicate striae being closely spaced to the last whorl, where they 

 become coarser and more widely spaced riblets; the color is fleshy to 

 pale yellow, with scattered corneous streaks, sometimes bordered with 

 an opaque white patch. In general shape, though slightly fusiform, 

 it resembles typical U. livida with its descending curved neck and 

 moderate aperture. The internal axis is somewhat sinuous, and the 

 lamellit'orm spiral thread is well developed for this group, lying near 

 the base in each whorl. 



Long. 18.3, diam. 3, ap. diam. 2.6, whorls 13. 



Long. 15, diam. 2.4, whorls 13. 



Long. 15, diam. 2.2, whorls 20 (entire). 



Central Cuba: On walls and stones at Mogotes de las Jumaguas, 

 very near Sagua la Grande, in the Province of Santa Clara. 



Urocoptis ( Gongylostoina) fortiuscula n. sp. Plate vi, figs. 24, 25, 26. 



Resembles U. livida occulta in color. The median whorls are 

 finely striate, but it differs from the last in its stronger and rather 

 swollen shell, the last whorl less or not at all descending, and the 

 aperture being larger. The internal axis is slightly sinuous and the 

 lamelliform spiral thread is near the base, as in U. pallidula. 



Long. 17.5, diam. 3.8, ap. diam. 3, whorls 11. 



Long. 14.5, diam. 3.2, whorls 9^. 



Some specimens from the same locality are much smaller: 



Long. 10, diam. 2.6, ap. diam. 2, whorls 8. 



Long. 12, diam. 3, whorls 9. 



Central Cuba : On and under stones at Casimba de Buenavista, 

 district of Malpaez near Sagua la Grande, in the Province of Santa 

 Clara. 



Urocoptis {Gongylostoma) bacillaris n. sp. Plate vi, figs. 7, 8. 

 Slenderly fusiform, somewhat swollen in the middle third, taper- 



