HELIX. 159 1 



H. JUSTINI Mal>ille, 1882. PI. 47, fig. 79. 



Imperforatef depressed-conic, solid, striate, destitute of cuticle and 

 color, not malleate nor granulate, spire conic, moderately elevated, 

 apex minute, obtuse, whorls 5, sub-depressed, a little rounded, the 

 first three regularly, rapidly, the last very rapidly increasing; suture 

 very distinct; body-whorl large, angulate, anteriorly obliquely 

 roundly subcompressed, much constricted and abruptly descending 

 at the aperture, convex-inflated below; aperture lunate, oblique, 

 irregularly transverse-oval; peristome thickened, obtuse, dentate, 

 margins joined by a thick callus, outer margin sinuous, bidentate, 

 columellar nearly straight, oblique, widely expanded over and 

 wholly covering the umbilicus. Diam. 21, alt. 13 mill. 



Quaternary of Ins. Teneriffe, near the light-house of Anaga. 



H. poirieri Mabille, is a synonym. 



Intermediate between H. _poc/ie and H. bi<J> ///<///*. The teeth 

 of the outer lip are stronger than in If. bidentalis more oblique in 

 direction, and obstructing the aperture more; basal margin is less 

 oblique, thicker, etc. The shell is neither malleate, like H. bidentalis 

 nor granulate, as in H. pouchet. 



H. HELYGAIA Mabille, 1882. PL 47, fig. 68. 



Imperforate, depressed-conic, solid, destitute of color or cuticle, 

 coarsely striate, and in well preserved examples with fine microscopic 

 decurrent lines ; spire widely convex, apex obtuse ; whorls 4J, a 

 little convex, rapidly (especially the outer) increasing, separated by 

 impressed sutures ; body-whorl large, turgid, visibly augulate, com- 

 pressed before the aperture, suddenly descending and constricted at 

 the aperture ; aperture oblique, lunate, small, somewhat subquadrate, 

 peristome thickened, subdentate in the middle, margins subconverg- 

 ing, joined by a subthickened callus ; columellar margin longly 

 appressed, excavated, adnate and callous at its insertion, uniting 

 with the sinuous outer lip with a decided angle. 



Diam. 25-28, alt. 14 mill. 



Quaternary of Ins. Teneriffe near Anaga. 



Allied to H. pouchet, but differing in the more regularly increas- 

 ing whorls, less prominent spire, thick peristome, and more devel- 

 oped process on the outer lip. 



H. CACOPLASTA Mabille, 1882. PL 47, fig. 75. 



Imperforate, subdepressed-globulose, thick, opaque, destitute of col- 

 or and cuticle, obtusely angular at the periphery, not malleate nor 



