UROCOPTIS, S. G. GONGYLOSTOMA. 253 



ment of the upper axial lamella, which in heynvmanni is 

 nearly as strong as the lower. There is only a trace of the 

 basal carina. 



The figures are from specimens received from Charles 

 Wright. 



L34. U. OBLIQUA (Pfeiffer). PL 58, figs. 53, 54, 55. 



Shell rimate, oblong, somewhat swollen, the upper third 

 tapering to a wide truncation; thin; streaked and marbled 

 with white and corneous. Surface rather closely striate, 

 closely crenulate below the sutures, at least on the upper 

 part of the shell. Whorls slightly convex, the last having 

 a distinct, cord-like keel around the base; only shortly free 

 in front. Aperture subcircular, hardly oblique, the lip 

 white, reflexed. Axis encircled by two equal, compressed 

 lamellae, the lower one of which is weakly denticulate in the 

 upper whorls. 



Length 15, diam. 4.8 mm. ; whorls 7%. 



Length 13, diam. 4 mm. ; whorls 7. 



Length 14, diam. 5 mm.; whorls 7%-8 (Pfr., type). 



Central Cuba: Near Puerto Principe (Chas. Wright). 



Cyl obliqua PFR., Malak. BL, xi, 1863, p. 11, no. 59; 

 Monogr., vi, p. 360 ; Novit. Conch., p. 250, pi. 63, f . 18-21. 

 ARANGO, Contrib , p. 105. SOWERBY, C. Icon., xx, pi. 4, f . 28. 



This species is near U. incerta, U. heynemanni, etc., but 

 differs by its two wide and equal axial lamellae, rather obese 

 shape and larger aperture. In distribution it lies far east 

 of the range of the other members of the group. 



135. U. COERULANS (Poey). PL 57, figs. 50, 51. 



Shell cylindric, tapering to a rather wide or a narrow 

 truncation above, solid, corneous-brown, the last whorl often 

 purple-brown, densely white-ribbed and marbled with white. 

 Surface somewhat glossy, closely and regularly rib-striate 

 throughout. Whorls convex, the last having a low, cord-like 

 basal carina, and very shortly free in front. Suture crenate- 

 beaded. Aperture vertical, dark chestnut inside, the lip con- 



