142 



UROCOPTIS OF JAMAICA. 



finely and closely rib-striate. Whorls 9i/> (Sy 2 to 10), mod- 

 erately convex, the latter half of the last having a strongly 

 pinched-up basal keel, becoming free in front. Aperture sub- 

 circular, oblique, usually somewhat guttered at the position 

 of the external keel; the peristome broadly expanded and re- 

 flexed, white or brown-tinted, more or less angular at the ter- 

 mination of the basal keel. Internal axis straight and simple. 



Length 36, diam. 9^2 mm. ; whorls 9%. 



Length 29, diam. 9 mm. ; whorls S l / 2 . 



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



Jamaica: Durham (Chitty) and Good Hope (Jarvis), in 

 southeastern Trelawny. Map no. 2, area no. 9. 



Cylindrella adamsiana CHITTY, Contributions to Conchology 

 [no. 1], p. 13 (October, 1853). Not C. adamsiana Pfr., 1851. 

 C. baquieana CHITTY, Ann. Lye. Nat. Hist, of N. Y., vi, p. 

 156 (October, 1855). PFR., Monogr., iv, p. 696; Conchyl. 

 Cab., p. 10, pi. 9, f. 9, 10. 



This species stands near U. nobilior, but it differs conspicu- 

 ously in the continuous peristome, which is always carried 

 forward free of the preceding whorl. The typical form is 

 restricted in range to a small area near Ulster Spring, in south- 

 eastern Trelawny. 



Subsp. PUDICA Pils. & Jarvis. PL 35, figs. 42-46. 



Shell usually smaller, thin, dull rose colored, without a band 

 at the suture ; basal keel less strong than in baquieana. 



Length 33, diam. 8.5 mm. ; whorls ll 1 /^. 



Length 31, diam. 9 mm. ; whorls 8*4. 



Length 26, diam. 8.7 mm. ; whorls S 1 ^. 



Southeastern Trelawny and southwestern St. Ann; types 

 from Cave Valley, in the latter parish. Area no. 10 of map 

 no. 2. 



This form occurs over a much larger area than baquieana, 

 Mr. Jarvis regarding the latter as a specialized local variety 

 of this more widely distributed race. In one specimen of the 

 type lot the peristome is shortly adnate above. The internal 

 pillar is straight and simple. Figures 42-45 are from Cave 

 Valley ; fig. 46 is the form from Aenontown, in which the axis 

 is thicker. 



