94 BRACK YPODELLA, JAMAICAN. 



base, usually interrupted on the penult, whorl. It occurs at 

 Mona House, St. Andrew (Henderson), with the typical semi- 

 nuda and intermediate forms. Typically this variety, and 

 the preceding (which do not occur together in any lot exam- 

 nied), are very distinct; but on account of the intergradation 

 of each with the type form, in most lots examined, I do not 

 think it worth while to name them at present. The distribu- 

 tion of each should be studied in detail. 



Crosse suggests that the presence of B. seminuda at Jeremie, 

 Haiti, reported by Weinland, may be due to accidental trans- 

 portation by commerce. Messrs. Henderson and Simpson did 

 not find it there. 



Subgenus SIMPLICERVIX Pilsbry, 1903. 



Brachypodella, with the high initial whorl of all Jamaican 

 forms of the genus, the neck shortly free and almost cylindric, 

 merely subangular below ; aperture nearly circular ; axis slen- 

 der and straight. Type B. inornata. (Simplex, simple; cer- 

 vix, neck.) 



The shell resembles Brevipedella of Cuba, Haiti and Porto 

 Rico, but the apex has the characteristic Jamaican modifica- 

 tion. I have not seen the species simplex and humilis of 

 Adams, and they may prove to belong elsewhere, as somewhat 

 similar shells are contained in the sections Bactrocoptis (VoL 

 XY, p. 143) and Spirostemma (Vol. XV, p. 284). The den- 

 tition of Simplicervix is unknown. 



41. B. INORNATA (C. B. Adams). PL 5, figs. 40, 47, 48, 49. 



" Shell subovate or fusiform, but elongated; whitish; with 

 fine, oblique, arcuate, sharp, prominent, but not very closely- 

 set, raised lines, anteriorly with two carinae, which are not 

 prominent; spire with the outlines moderately convex in the 

 middle and lower whorls; apex truncate, with the loss of 

 whorls; 8 or 9 whorls remaining, quite convex, with a deep 

 suture ; last whorl well detached and produced ; aperture sub- 

 angular on the right side, in the rest rounded; lip a little 

 thickened, narrow, moderately reflected. Length .38 inch- 

 breadth .11 inch " (Adams). 



