128 UROCOPTIS OF JAMAICA. 



the upper margin being straightened; pale fleshy-brown in- 

 side. Peristome expanded, somewhat reflexed, somewhat 

 thickened, whitish. Internal axis straight, stout and tapering 

 within the last two whorls, slender above. 



Length 16.4, diam. 5.7 mm. ; whorls 7%. 



Length 15, diam. 5.7 mm. ; whorls 7. 



Jamaica: St. Ann's (Henderson & Simpson). 



Cyl. striata Chitty (?), HENDERSON, Nautilus, viii, p. 19, 

 no. 82. 



This species is related to U. ovata sanctaanna, but differs 

 in being much more slender and more coarsely ribbed. U. 

 gravesii has a more slender neck and is very minutely sculp- 

 tured. 



A large series was collected by Mr. J. B. Henderson, Jr., in 

 1893-4. The fully adult shell seems to lose, in many cases, 

 all of the tapering whorls, as in fig. 58 ; but most of the speci- 

 mens taper somewhat above, though less than in U. gravesii. 

 The smallest specimen measured is 14.5 mm. long, 4.8 wide, 

 with iy 2 whorls ; the widest is 6 mm. in diam., with a length 

 of 15. The enlarged figure of sculpture (pi. 32, fig. 83) 

 shows how strongly it differs from U. ovata sanctceannce (fig. 

 81), or U. Irevis (fig. 76). The sculpture of U. olesa (fig. 

 78) is almost equally coarse, but less strongly in relief. All 

 of these figures are enlarged 20 diameters. 



Group of U. gravesii. 



9. U. GRAVESII (C. B. Adams). PL 33, figs. 14-17. 



Shell cylindric-fusiform, solid and strong, gray-white, 

 glossy, sculptured with close, fine, regular, smooth, straight 

 striae. Whorls 7 to 11, but slightly convex, the last free in 

 front, with a very weak basal keel or none. Aperture sub- 

 circular, the peristome broadly expanded and reflexed, some- 

 what trumpet-shaped. Internal column straight and simple. 



Length 22.5, diam. 6.3 mm. ; whorls 9. 



Length 18.5, diam. 5.5 mm.; whorls 8. 



Length 16.5, diam. 5 mm. ; whorls 7%. 



Length 15.5, diam. 5.3 mm. ; whorls 7. 



