UROCOPTIS OP HAITI. 147 



22. U. PUP/EFORMIS (C. B. Adams). PL 34, figs. 32-34. 



Shell cylindric-fusiform, the upper half tapering; thin but 

 moderately solid ; light brown or white ; glossy, very regularly 

 and most minutely striate, the strige smooth, as wide as the 

 intervals, moderately arcuate. Whorls 6 to 7, moderately 

 convex, the last laterally compressed, its last half having a 

 wide, bluntly rounded but rather strongly projecting basal 

 keel; free in front. Aperture oblique, subcircular, the peri- 

 stome expanded and broadly reflexed, white. Internal axis 

 slender and straight. 



Length 14, diam. 3.5 mm. ; whorls 7. 



Length 12, diam. 3.5 mm. ; whorls 6*4. 



Jamaica: Ft. William, Westmoreland (Jarvis) ; Mulgrave, 

 St. Elizabeth (Henderson) ; Heavytree, in the extreme north 

 of Manchester (Gloyne). 



Cyl. pupaformis C. B. A., Contrib. no. 7, p. 102 (April, 

 1850). PFR., Monogr., iii, p. 572. SOWERBY, Conch. Icon., 

 xx, pi. 16, f. 143. GLOYNE, Journ. de Conch., xx, 1872, p. 35. 



The small number of whorls, brilliant gloss and very fine 

 striation are characteristic. The sculpture is even finer than 

 in U. hydrophana. 



Subgenus AUTOCOPTIS Pilsbry, 1902. 



Shell rather large for the genus, the axis straight or mod- 

 erately twisted, an accessory lamella (pi. 40, fig. 53) revolving 

 about and continued beyond its lower termination, sometimes 

 more or less completely united with the axis. Type U. moni- 

 lifera. Distribution, Haiti. (Autocoptis, self -cut or trun- 

 cated. ) 



The Haitian forms of the genus Urocoptis differ con- 

 spicuously from the Jamaican in general appearance, color*- 

 ing, sculpture and the structure of the axial region within the 

 last whorl. The nepionic sculpture is unknown. As a general 

 rule, Jamaican species lose a far greater number of early 

 whorls than Haitian, in most of which the summit tapers 

 rapidly, and the truncation is narrow. The plug is in most 

 species narrowly tongue-shaped (pi. 40, fig. 47), but in a few 

 it is flat and steep (pi. 40, fig. 49) . There are also some tran- 



