238 HELIX-OBBA. 



arcuate ; calloused, subtruncate ; peristorne white, expanded, col- 

 umellar margin dilated. 



Alt. 26, greater diam. 29 ; lesser 25 mill. (Pfr.) 



Habitat unknown. 



H. camelus PFR. P. Z. S. 1855, p. Ill ; Monographia iv, p. 247. 



H. ANACARDIUM Dohrn. PI. 53, figs. 5, 6, 7. 



Shell narrowly umbilicated, globose-turbinate, rather solid, chest- 

 nut colored ; finely arcuately striated ; under a lens finely wrinkled, 

 little shining. Spire convex-turbinate ; whorls 6, moderately in- 

 creasing, the last very obtusely angulated, a little descending in 

 front, the base subdepressed. Aperture diagonal, bluish inside, lu- 

 nate-rounded ; peristome lilac-colored, all around shortly expanded, 

 margins approximating, joined by a callus of the same color ; col- 

 umellar margin reflexed, half-covering the perforation, having one 

 tubercle on its inner edge. 



Alt. 21, greater diam. 28, lesser 24 mill.; width of aperture 15 



mill. (Dohrn.') 



Habitat unknown. 



Helix anacardium DOHRN, Nachr. Bl. D. M. Ges. 1878, p. 68 ; 

 Continuation of Kiister's Conchy lien Cab., p. 599, t. 175, f. 5, 6, 7. 



Described from a single specimen of unknown origin. It is allied 

 to H. campanula, codonodes, etc., but seems to be perfectly distinct. 



H. HEMIOPTA Benson. PI. 31, figs. 21, 25 ; pi. 64, figs. 67, 68, 69, 

 70, 71, 72. 



Shell narrowly umbilicated, depressed-conoidal, a trifie striatulate, 

 nearly smooth, very minutely granulated, opaque, whitish ; last 

 whorl chestnut colored above, darker toward the periphery ; spire 

 convex-conoidal, apex obtuse, suture scarcely impressed. Whorls 

 4i, a little convex, sensibly widening, the last a little concave above 

 the obtusely angled periphery, somewhat convex below ; aperture 

 oblique, subquadrate-lunate, concolored within ; peristome a little 

 expanded, arched forward above, narrowly reflexed beneath, margins 

 remote, the columellar strongly dilated above, nearly covering the 

 umbilicus. (Bens.) Alt. 10, greater diam. 16, lesser 13i mill. 



Port Blair, Andaman Is. 



H. hemiopta BENS. Ann. Mag. N. H. 3d Ser. xi, p. 318, May 

 1863. PFR. Monogr. v, p. 347. HANL. & THEOB. Conch. Indica, 

 t. 30, f. 4 ; t. 53, f. 8. VON MARTENS, Novit. Conch, v, p. 37, t. 143, 

 f. 1-8. DOHRN, Kiister's Conchyl. Cab., p. 578, t. 170, f. 5-7. 



