UROCOPTIS OF JAMAICA. 137 



"Cylindrella rosea Pfr. var. major Ad. Length 1.3 inch; 

 breadth .45 inch. 



' ' Cylindrella rosea var. fortis. Shell as long as var. major, 

 but with less diameter and more cylindric. ' ' 



The variety FORTIS C. B. Ad. (pi. 28, fig. 5) is intermediate 

 between ambigua and magna in form and size. The figured 

 specimen (no. 33 c, coll. J. B. Henderson, Jr.) was from C. B. 

 Adams. It ha the usual weak basal keel, and measures, 

 length 25.5, diam. 9.2 mm., and has iy 2 whorls. A series of 

 similar shells in the collection of the Academy indicates that 

 it is probably a local race ; but the locality is unknown. 



(3) Var. ELIZABETHENSIS Pils. & Jarvis. PL 29, figs. 33, 34, 

 Bogue Estate, near Balaclava, St. Elizabeth, Jarvis. Shell 

 narrow and cylindric, the sutures scarcely impressed, whorls 

 nearly flat. 



Length 25, diam. 7.3 mm. ; whorls 8. Bogue Estate. Type. 



Length 22.3, diam. 7 mm.-; whorls 8%. Hermitage, St. 

 Elizabeth. 



Length 26, diam. 8 mm. ; whorls 8%. Hermitage, St. 

 JElizabeth. 



This race is commonest in area 8 a of map 2, in St. Eliza- 

 beth. 



15. U. CYLINDRUS (Chemnitz, Desh.). PL 28, figs. 6, 7, 8, 9. 



Shell cylindric, slowly tapering above and very broadly 

 truncate; thin; dark purple, sometimes with a bluish "bloom" 

 like that of a plum, or varying toward rose-purple ; the surface 

 glossy, often with a silken lustre from the fine, smooth, close 

 and even striation. Whorls 7% to 9, moderately convex, the 

 last free in front, usually with a strong, cord-like basal keel, 

 and conspicuously swollen at the shoulder, behind the aper- 

 ture. Aperture oblique, transversely oval, the peristome Isa- 

 bella tinted, expanded and broadly reflexed, the upper mar- 

 gin much less curved than the other margins, a shallow gutter 

 at the junction of the right with the basal margin. Internal 

 axis very slender and straight. 



Length 27, diam. 8.2 mm.; whorls 9. Hills behind Blue- 

 fields. 



