BRACHYPODELLA, JAMAICAN. 101 



mens before us the lip is but slightly expanded. It inhabits 

 Flamstead, in the Port Royal mountains. ' ' This brief account 

 is vitiated by an error: the diameter ".22 inch " is a mis- 

 take for .11 inch, apparently from misreading the scale ; and 

 no character whatever is given to differentiate the species 

 from the small variety of B. agnesiana. Under these circum- 

 stances, my identification of the specimens taken by Mr. 

 Jarvis with Prof. Adams' form lies open to the objection 

 that it is hypothetical; but I believe the hypothesis justified, 

 though it is only by courtesy that Adams can be quoted as 

 author of the species. His types should be examined. 

 The range of this species lies west of that of B. agnesiana. 



46. B. ALABASTRINA (Pfeiffer). 



Shell truncate, exactly cylindric, obliquely and closely, ele- 

 gantly costulate-striate, alabastrine ; apex slightly tapering, 

 black; whorls 15, flat, the last projecting, acutely carinate 

 basally. Aperture subcircular, channelled at the base ; peris- 

 tome expanded throughout, subreflexed. Length 15, diam. 

 3.66 mm., aperture 2.5 mm. long (Pfr.) . 



Jamaica (Brit. Mus.). 



Cyl. alabastrine/, PFR., in Phil., Abbild., ii, p. 52 (Oct., 

 1845) ; Monogr., ii, p. 375. ?? SOWERBY, C. Icon., xx, f. 81. 



Quite unknown to recent collectors in Jamaica, so far as I 

 have been able to learn. It is decidedly wider than any form 

 of B. alba, but certainly approaches B. pearmanccana in 

 dimensions, and the type should be compared with that 

 species. 



47. B. PEARMAN^ANA (Chitty). PL 4, figs. 23-27. 



" This shell approaches nearest to Cyl. alba var. striatella 

 (Contrib. to Conch., p. 20), and may be C. alabastrina Pfr., 

 of which I have not seen even the description. Shell almost 

 cylindrical, rounding off in the last whorl, and with convex 

 outlines from the 9th whorl towards the truncate apex ; cream 

 white. Stria? very visible under a good lens, but much finer 

 than in C. alba var. striatella. Half of last whorl carinated ; 

 but by no means so much so as in the last-named shell. Apex 



