UROCOPTIS, S. G. GONGYLOSTOMA. 195 



like. Whorls slightly convex, the last shortly free in front, 

 having a low, cord-like carina below. Aperture subcircular; 

 peristome expanded and reflexed, white. Axis (fig. 93 x 6) 

 provided with three spiral lamella, the lower one widest, its 

 termination visible within the aperture, the upper one low and 

 cord-like, obsolete in the upper whorls. 



Length 21.5, diam. 5.7 mm.; whorls 9 l / 2 . 



Length 18, diam. 5.3 mm. ; whorls 9 1 /3- 



Length 19-22, diam. 6.5 mm.; whorls 8-11 (Pfr.). 



Western Cuba: Punta de la Jaula, Guane, on rocks 

 (\Vright). 



Cyl. striatella Wright mss., PFR., Malak. BL, xi, 1863, p. 2; 

 Novit. Conch., p. 246, pi. 63, f. 4-6; Monogr., vi, p. 368. 

 ARANGO, Contrib., p. 111. SOWERBY, C. Icon., xx, pi. 7. f. 55. 



Somewhat shorter and wider than U. humboldtiana, with 

 distinctly finer striation, and not more than three axial la- 

 mella3 in any whorl. Figs. 91, 93 are magnified 6 diameters, 

 the others natural size. 



64. U. SOEVA ('Gundl.' Pfr.). PL 46, figs. 69, 70. 



Shell sinistral, cylindric-tapering, rather widely truncate, 

 brown. Surface somewhat glossy, very closely and finely 

 sculptured with thread-like stria?. Whorls but slightly con- 

 vex, the last shortly free in front, having a low cord-like basal 

 keel. Aperture subcircular, the peristome expanded and re- 

 flexed. Axis provided with three spiral lamellae, the lowest 

 one the largest, extending nearly to the aperture, finely crenu- 

 late in the upper half of the shell ; the upper lamella smallest. 



Length 26, diam. 6 mm. ; whorls 11. 



Length 22, diam. 5.7 mm. ; whorls 9 l / 2 . 



Length 24, diam. 5.7 mm.; whorls 11-12 (Pfr.). 



Western Cuba : Ceiba Mocha, a R. R. station south of Pan 

 de Matanzas, under stones (Gundlach). 



Cyl. humboldtiana var., PFR., in Phil., Abbild., vii, p. 8, 

 pi. 3, f . 11 ; Conchyl. Cab, p. 15, pi. 2, f . 22, 23. Cyl. hum- 

 boldtiana SOWB, C. Icon, xx, pi. 3, f. 25. Cyl. scava Gundl. 

 mss, PFR, Malak. BL, x, 1863, p. 248 ; Monogr, vi, p. 368. 

 BLD, Ann. Lye. N. H. of N. Y, viii, 1865, p. 161, f. 4 (denti- 





