HELIX-DENTELLARIA. 



BINNEY Ann. N. Y. Acad. Sci. iii 1884, p. Ill, t. 16, f. s, and t. 9, 

 f. D. (Jaw and dentition.) ( Caracolla scabrella MKE. Cat. Malsb. p. 

 5, teste Pfr.) 



Distinguished from other carinated Dentellaria by the two 

 maculose or interrupted bands of the upper surface. 



The specimens from St. Christopher (St. Kitt's) are large, flat- 

 tened ; I have seen no specimens but fossil ones from this island. 



Alt. 11, diam. 25 mill. 



Var. NEVISENSIS Pilsbry. PI. 25, figs. 54, 55. 



A small form collected by OBER on the little island of Nevis. 

 The whorl is less deflexed at the aperture than in typical H. joseph- 

 inse ; the granulation of the surface is nearly effaced ; bands of the 

 base two or one, very faint or obsolete ; upper surface with a single 

 continuous band above the carina. Alt. 9, diam. 17-18 mill. 



H. PERPLEXA. Ferussac. PL 56, figs. 15-17. 



Imperforate, depressed, acutely carinated, solid, opaque, lusterless, 

 pale brown, unicolored, or with a chestnut band above and one 

 beneath ; surface coarsely granulose, granules whitish ; spire more 

 or less elevated, conical, obtuse ; apex planulate ; sutures linear ; 

 whorls 4 to 5, the inner two convex, smooth, shining, the remain- 

 der nearly flat, penultimate nearly as wide as the outer whorl ; body- 

 whorl acutely carinated at the periphery, deeply deflexed anteriorly ; 

 aperture oblong, obliquely truncated by the parietal wall, sub- 

 horizontal ; peristome broadly expanded, white, terminations joined 

 by a white parietal deposit, lower margin bearing two rather strong 

 teeth, the outer compressed, its position marked behind the peristome 

 by a slight depression ; inner tooth generally smaller, often with a 

 minute denticle on each side of it. 



Alt. 15, diam. 26 mill. ; alt. 12, diam. 27 mill. ; alt. 13, diam. 22 

 mill. 



Grenada and Grenadines Is. 



H. perplexa FER. Hist. t. 56 A, f. 1. PFR. Monogr. iii, p. 216. 

 REEVE, f. 1210. BLAND, Am. Journ. Conch, iv, p. 188. H. 

 granifera GRAY, P. Z. S. 1834, p. 68. PFR. Conchy I. Cab. p. 347, t. 

 62, f. 16, 17 and Monogr. i, p. 304. REEVE, f. 252. Dentellaria 

 perplexa Fer. W. G. BINN. Ann. N. Y. Acad. Sci. iii, 1884, p. 112, 

 t. 16, f. T and t. 9, f. j. (Jaw and dentition.) 



Varies considerably in elevation of the spire and in size. The 

 granules are sometimes nearly effaced above. The coarser granula- 



