26 HELIX HEMITROCHUS. 



covering or almost covering the umbilical perforation ; parietal Avail 

 and inside of aperture pink or not differently colored from the base. 



Alt, 10-13, diam. 16-18 mill. 



Long Cay, Fortune Id., Bahamas. 



H.milleri PFR. Mai. Slat., 1867, p. 126. and Monographia v, p. 

 233. 



H. COSTANTIOR Weinland. PI. 12, fig. 34. 



This form is generally smaller than H. varians ; it has a decided 

 tendency toward interruption of the spiral bands, aud the whorl is 

 very much more deeply deflexed anteriorly than in varians. 



Imperforate or very nearly so ; conical, compact, solid, opaque, 

 shining, delicately striate, white, painted in numberless patterns 

 with continuous and interrupted bands of deep aud yellowish brown, 

 narrow or broad, few or numerous, those above and below the per- 

 iphery generally broken into spots or longitudinal streaks ; some- 

 times unicolored, white; apex whitish, purple or rosy; spire ele- 

 vated, whorls 5, slightly convex, the last globose, very deeply de- 

 flexed anteriorly; aperture rounded-lunar, very oblique, rather 

 small, generally rosy and banded within ; peristome scarcely labiate, 

 margins converging, right margin expanded, white or colored, col- 

 umellar ^margin reflexed, adnate over the umbilical perforation ; 

 parietal wall covered by a rosy callus, rarely white. 



Alt. 10-13, diam. 14 mill. 



Inagua, Rum Cay, Turk's Id., Crooked Id., Bahamas. 



H. constantior'WEiNij. Jahrb. d. Mai. Gesell, vii, 1880, p. 371, 1. 12, 

 f. 19. 



There is, of course, great variation in the banding and propor- 

 tions of altitude to diameter. Note the italicised passages in the 

 above description. The form is quite easy to recognize. There is 

 no difference between the suites before me from several of the 

 islands. 



H. CARIBJEA Weinlaud. PL 20, figs. 69-71. 



This shell resembles H. varians very closely in texture and col- 

 oration. It is imperforate, or has a slight umbilical fissure behind 

 the columellar lip ; the form is semiglobose or conoidal-elevated ; 

 not so conical as H. varians, and the body-whorl usually more de- 

 pressed. It is solid, opaque, lightly striatulate, " brown fasciate 

 with white, unicolored white, or multifasciate with brown." 

 Whorls 4-2, shaped like those of H. varians except the last, which is 



