158 HELIX. 



striate and coarsely crispate-malleate ; spire convex, subprominent, 

 apex minute, subrugose ; whorls 5-5 J, first planato-convex, rapidly 

 and regularly increasing, last very rapidly increasing ; suture im- 

 pressed especially at last whorl ; body whorl large, rounded, below 

 slightly flattened, toward aperture slightly dilated, briefly descend- 

 ing, subconstricted at the peristome ; aperture oblique, lunate, 

 * oblong ; peristome obtuse, reflexed ; ends not converging, connected 

 by a slightly heavy callus, basal margin nearly straight, callous, 

 with a long internal tooth. 



Quatenary of Ins. Grand Canary, near Agaete* 

 Allied to the preceding. 



H. CACOPISTA Mabille, 1883. PI. 48, figs. 5, 6. 



Imperforate, depressed conic, subthickened, without epidermis, 

 yellowish ruddy, with five white-dotted rufous bands ; apex minute, 

 obtuse, granulate, concolored ; whorls 5-5 J, scarcely convex, sub- 

 irregularly increasing, separated by distinct sutures ; the last large, 

 slightly angular, subplanulate below, briefly deflexed at aperture ; 

 aperture lunate-oblique, ovate-elongate ; peristome subthickened 

 within, widely expanded, subfragile, acute, ends converging, con- 

 nected by a thin callus ; basal margin slightly incurved, with a 

 long appressed callus ; columella short, tortuous, with a strong um- 

 bilical callus, and a lamelliform, elevated, straight tooth. 



Diam. 26, alt. 12 mill. 



Quaternary of Ins. Grand Canary, near Agaete. 



H. CATEUCTA Mabille, 1883. PL 47, fig. 82. 



Imperforate, depressed subglobose, thick, destitute of cuticle, shin- 

 ing, yellowish, with four rufous spiral bands, maculated with white; 

 spire conic, apex minute, nearly smooth, concolored; whorls 6, first 

 plano-convex, last very rapidly increasing, separated by distinct 

 sutures; body-whorl large, rounded, subflattened below; aperture 

 oblique, oblong-lunate, peristome thickened, reflexed, its ends sub- 

 approximating, joined by a thin callus; columellar margin nearly 

 straight, widely adnate, subexcavated, with a lamellose denticle. 



Diam. 35, alt. 18* mill. 



Quarternary of Ins. Grand Canary, near Agaete. 



Whorls of the spire flatter than in H. subgravida, the last not 

 angular and more dilated. 



