238 HELIX-OBBA. 



arcuate; calloused, subtruncate; peristome 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. (Dofirn.') 



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 trifle 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 

 4?, 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 13-i 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. 



