HELIX HEMITROCHUS. 25 



elevated, conical, apex minute, sub-obtuse ; whorls 5 to 5J, convex, 

 the last deflexed anteriorly ; aperture rounded-lunate, oblique ; 

 white or rosy within and showing the bands when there are any ; 

 peristome labiate within, straight, not expanded except on the baso- 

 columellar margin, where it is reflexed and adnate above the um- 

 bilicus, with a callus plate within, which is generally truncate at 

 base in adult specimens; columella and parietal wall crimson. 



Alt. 17, diam. 16 mill. 



'Florida Keys and the Bahamas. 



H. varians MENKE, ( Cat. Malsb,p. 5) teste PFR., Monographia i, p. 

 238. Conchyl. Cab. p. 221, t. 109, f. 105. W. G. BINNEY, Terr. 

 Moll U. S. iv, p. 51, t. 78, f. 22 ; L. and Fr. W. Sh. i. p. 184. JET. 

 carnicolor PFR. Symboke i. p. 37. DESK, in FER., Hist, i, p. 205, t. 

 29A, f. 14-17. REEVE, Conch, Icon. f. 283. IT. submeris MIGH- 

 ELS Proc. Bost. Soc. N. H. 1844, p. 187. PFR. Monogr. iii, p. 183. 

 H. rhodocheila BINNEY, Terr. Moll. i. H. polychroa BINNEY. Terr. 

 Moll, ii, t. 46, 47. Hemitrochus hcemastomus SWAINS. Malawi., p. 

 165, f. 19. Hemitrochus varians W. G. BINN. Manual Am. L. Sh. 

 p. 358. f. 389. 



As in most species of Hemitrochus, the coloration is extremely 

 variable. The species is abundant on the Florida Keys, and on 

 New Providence, Inagua, Crooked Id. etc., of the Bahamas. Pfeif- 

 fer says also, " Porto Rico ; " but this is probably erroneous. 

 H. MILLERI Pfeiffer. PL 32, figs. 39, 40. 



This form belongs to the group of species immediately allied to 

 H. varians, H. gallopavonis, etc. 



Shell almost covered-perforate, depressed-conoidal, rather solid, 

 opaque, white, marked with various arrangements of spiral bands 

 and oblique streaks of varying shades of chesanut-brown ; sometimes 

 all brown except a white peripheral girdle ; but the most attractive 

 style of painting is shown by specimens of a light yellowish tint of 

 chestnut, obliquely streaked all over with deep chestnut, and with 

 or without black or white peripheral fascia. The spire is generally 

 less elevated than in H. varians, and about the same as in H. gallo- 

 pavonis which is a smaller, thinner species. Whorls about 5 ; 

 apex obtuse, red or corneous. Surface densely, finely sub-costulate 

 striate, the strise deeper, more regular than in H. varians ; body- 

 whorl descending anteriorly; aperture rounded lunar, oblique; 

 peristome in fully adult individuals labiate within, the outer and 

 basal margins expanded slightly ; columellar margin reflexed over, 



