UROCOPTIS OF JAMAICA. 145 



Keel on the last whorl scarcely perceptible. Spire with con- 

 vex outlines. Apex broadly truncate. Whorls left 9%, very 

 convex, not marginate ; with a well-impressed suture. Aper- 

 ture produced, as in all this class. Lip nearly orbicular, re- 

 flected and thickened. Length .61, breadth .16 inch. Hab- 

 itat Burnt Hill Glade, Westmoreland (Chitty). 



This seems to be a western race of Adams' montana. 



20. U. HOLLANDI (C. B. Adams). PL 34, figs. 35-39. 



* * Shell rather slender, cylindrical in the lower three-fourths, 

 slowly tapering above ; wax color ; with very minute crowded 

 transverse striae, and the anterior spiral keel not very promi- 

 nent; apex rather broadly truncate, with the loss of 

 whorls; whorls remaining ten, subplanulate, with a well- 

 impressed suture ; aperture considerably produced beyond 

 the penult, whorl, between orbicular and trapezoidal, slightly 

 effuse by the canal within the anterior keel ; lip well expanded, 

 moderately reflected. 



"Length .82 inch; breadth .18 inch." [20% x 4% mm.] 

 (C.B. Ad.). 



Jamaica: Balaclava, Ipswich and Troy, in the interior of 

 St. Elizabeth (P. W. Jarvis) ; Mulgrave, near Ipswich ( J. B. 

 Henderson, Jr.). 



Cyl. Holland* C. B. A., Contrib. no. 5, p. 82 (1850). PFR., 

 Monogr., iii, p. 570. SOWERBY, Conch. Icon., xx, pi. 9, f. 76. 

 Cyl. augusta C. B. A., t. c., p. 83 (1850). PFR., Monogr., iii, 

 p. 571. SOWERBY, Conch. Icon., xx, pi. 7, f. 63. 



This species is usually larger than U. rosea, and its small 

 variety, montana; is much more finely striate, has a more 

 strongly projecting basal keel, and the internal column is 

 straight. The color varies from red-brown to white, but it is 

 usually light brown. Specimens measure : 



Length 21.5, diam. 4.2 mm. ; whorls 10%. Ipswich. 



Length 15.5, diam. 4 mm. ; whorls 8%. Balaclava. 



Length 19, diam. 4 mm. ; whorls 10. Mulgrave. 



Length 17.5, diam. 4 mm. ; whorls 9y 3 . Mulgrave. 



The figures are from Ipswich specimens. In the series 

 before me I do not find it practicable to separate C. augusta 

 from Hollandi. The description follows: 



