HELIX HEMITROCltUS. 37 



er, sometimes scarcely visible, and the apex is corneous, not reddish. 

 The umbilicus is not so much expanded as in H. rufoapicata. 



Alt. 9-10, diam. 13-15 mill. 



Jamaica. 



H. graminicola C. B. AD. Contr. to Conch, ii, p. 32,. (1849.) H. 

 gilva var. PFR., Monograplda. 



Pfeiffer is in error in referring this form to H. gilva Fer. Its 

 affinities are with H. rufoapicata Poey. In this trio of pretty little 

 species, graminicola rufoapicata, amplecta, the coloration is com- 

 paratively constant. I have two trays of specimens from Cuba which 

 show a partial coalescence of the characters of graminicola and 

 rufoapicata. The latter form may finally rank as a variety of the 

 former. 



H. SAUVALLEI Arango. 



Perforate, depressed-globulose, thin, striate, corneous ; spire con- 

 vex-conoidal, apex minute ; whorls 4, rather convex, the last large, 

 rounded, somewhat descending anteriorly ; aperture oblique, lunar- 

 rounded ; peristome simple, margins sub-converging, right lip slight- 

 ly expanded, colnmellar lip dilated above, with an arched reflection. 



Alt. 11, diam. maj. 11, min. 9 mill. (Pfeiffer.) 



Baracoa, Cuba. 



H. sauvallei ARANGO in PFR., Mai. Blat 1866, p. 58 ; Monogr. v, 

 p. 323. ARANGO, Faun. Mai. Cub. p. 75. 



Known to me only by the above diagnosis. 

 H. DEPIOTA Grateloup. PI. 13, f. 68. 



Imperforate, subglobose, conoidal, thin, white, very delicately 

 striate, painted with bands and varied lines of yellowish-brown, in- 

 terrupted; lip simple, acute. 



This pretty shell has a certain resemblance to H. pisana Miill., 

 but it is a little smaller and not umbilicated. The inside edge of 

 the right lip is white instead of rose. The upper surface is covered 

 with numerous more or less deep yellowish brown transverse bands, 

 interrupted by oblique lines of the same color. Five whorls of the 

 spire convex. Alt. 11, diam. 15 mill. (Grateloup!) 



"Ins. St. Thomas; New Orleans," (Grat.) 



H. depicta GRAT. Actes Soc. Linn. Bord. xi, p. 399, t. 1, f. 12. 

 1839. PFR. Monogr. i, p. 27. 



It is impossible to tell what this shell is. It does not exist at 



