UROCOPTIS OF JAMAICA. 125 



Rock Fort, near Kingston (Johnson and Fox, figs. 9, 77) ; 

 Hope River, farther eastward, 5 or 6 miles from Kingston 

 (Henderson and Simpson, figs. 5-8). 



Cylindrclla columna AD., Contrib. no. 2, p. 22 (Oct., 1849). 

 -PFR., Monogr., iii, p. 570. HENDERSON, Nautilus, viii, p. 

 19, no. 89 (not no. 81). C. brevis var. intermedia C. B. A., 

 HENDERSON, Nautilus, viii, p. 19, no. 87. 



A short, pillar-like form, typically quite easily distinguished 

 from brevis. Even more frequently than in brevis, the peri- 

 stome remains adnate above. It is common a few miles east 

 of Kingston. At an old lime-kiln at Rock Fort the shells are 

 about 13 mm. long, 4 to 5 mm. wide, with 7 to 9^ whorls, and 

 chiefly brownish (figs. 8, 77). Specimens from Hope River 

 (pi. 33, figs. 5-8) are much more variable in size: 



Length 21, diam. 7.2 mm. ; whorls 



Length 17, diam. 6 mm. ; whorls 9. 



Length 11.5, diam. 4.3 mm. ; whorls 



All intermediate sizes are fully represented. The whorls 

 are flat or slightly convex, and the color varies from gray- 

 white to occasional pink shells. 



C. col tan mi- "var. intermedia more resembles C. brevis in 

 having the whorls a little convex ; but the shell is longer than 

 the type of C. columna, and the aperture is a little larger. 

 Length .78, breadth .22 inch [19.5, 5.5 mm.]" (C. B. Ad.). 

 This form seems to have very slight claims to varietal distinc- 

 tion. I would refer the specimens before me, so named by 

 Adams, to U. brevis. 



Var. ABBREVIATA (Deshayes). PL 33, figs. 90-94. 



One of the most cylindric of the genus ; broadly truncate at 

 the summit, the spire very obtuse; composed of 6 nearly flat 

 whorls, very slowly increasing, and joined by a simple, super- 

 ficial suture. The last whorl is very short, a little higher than 

 wide, its length about two-thirds that of the spire, base very 

 convex, bearing a narrow, obtuse angle, further down than in 

 other species. The aperture projects forward but little, is 

 entirely free, circular, white; peristome thin, sharp, and 

 strongly reflexed. Surface covered with very fine, regular 



