144 UROCOPTIS OF JAMAICA. 



Cyl. rosca PFR., in Philippi, Abbild., i, p. 184, pi. 1, f. 3 

 (Dec., 1844) ; Monogr., ii, p. 374; Conchyl. Cab., p. 20, pi. 2, 

 f . 31, 32. Not C. rosea of C. B. Adams and subsequent Amer- 

 ican authors and collectors. Cyl. montana C. B. ADAMS, 

 Contrib. no. 2, p. 20 (Oct., 1849) . GLOYNE, J. de Conch., xx, 

 p. 36. SOWERBY, Conch. Icon., xx, pi. 5, f. 44. HENDERSON, 

 Nautilus, viii, p. 19, no. 80. Cyl. striata CHITTY, Contrib. to 

 Conch., p. 12 (Oct., 1853). 



Pfeiffer's original description and figures are copied. The 

 name C. rosea was transferred by C. B. Adams to a species of 

 the U. cylindrus group, and the present species he described 

 as C. montana. Subsequent American and Jamaican authors 

 and collectors have followed this erroneous course. The type 

 of C. rosea Pfr. was slightly larger than specimens ordinarily 

 encountered, though the diameter given, "5 mill.," probably 

 was measured to the outside of the outer lip. The type of 

 C. montana measures 14.5 mm. long, 4.07 wide. 



The species as ordinarily seen (pi. 34, figs. 22, 23, 27, 28) 

 varies in color from a beautiful rose tint to brownish-rose 

 and to white. The sculpture consists of regular, strongly 

 arcuate riblets, separated by intervals of about double their 

 width. The last whorl has a moderately conspicuous, wide, 

 obtuse basal keel, with a slight depression along each side. 

 The round aperture has a well-reflexed lip. The internal axis 

 is distinctly spiral within the lower three or four whorls, 

 straighter and more slender above (fig. 27). 



Length 14.5, diam. 3.7 mm.; whorls 9y 2 . 



Length 14.5, diam. 4 mm. ; whorls 9. 



Length 15.5, diam. 3.4 mm. ; whorls 10y 2 . 



Length 15.3, diam. 3.2 mm. ; whorls 9y 2 . 



It occurs in the interior of St. Elizabeth, at Balaclava and 

 Troy (P. W. Jarvis), and at Wi thorn (Henderson) ; Mande- 

 ville, under stones (Gloyne). 



Var. STRIATA (Chitty). 



Like montdiKt, etc. Shell short and thick, subovate; pure 

 white, truncate apex deep gray. Coarsely set shining striae, 

 coarser than C. kydrophana and C. montana. Striae arcuate. 



