HELIX. 17$ 



thick, reflexed, margins converging, the basal appressed, obscurely 

 subdentate, with a adnate callus. 



Bufadero, Ins. Teneri/e, Canaries. 



This species is more depressed than the H. consobrina, the last 

 whorl is without trace of angulation, is not gibbous toward the 

 aperture nor sensibly constricted, but is more deflected; the striation 

 is stronger, and the surface is not granulate. 



H. THANASIMA Mabille, 1883. PI. 47, fig. 74. 



Imperforate, conic-depressed-globose, striate, irregularly malleate,. 

 minutely granulate ; spire convex-conic, apex smooth, obtuse ; whorls 

 4-5, the upper rapidly, the following very rapidly increasing, separa- 

 ted by subimpressed sutures; body-whorl large, distinctly carinated 

 at the periphery, toward the aperture gibbously dilated, narrowly, 

 superficially constricted behind the peristome, obliquely dilated 

 beneath; aperture oblique, lunate, transversely subquadrate; peri- 

 stome thickened, revolute, obtuse, margins subapproximating, joined 

 by a callus; the outer margin markedly sinuous, tuberculate in the 

 middle, basal margin concave, excavated, adnate and impressed at 

 insertion. Diam. 23, alt. 14 mill. 



Quaternary deposit at Anaga, Teneriffe. 



H. EPHOKA Mabille, 1882. PI. 47, fig. 72. 



Imperforate, subglobose-turbinate, thick, solid, opaque, costulate- 

 striate, all over minutely malleate-punctulate ; spire moderately 

 prominent, apex obtuse, smooth; whorls 5, regularly, rapidly increas- 

 ing, separated by impressed suture; the last large, angulate, toward 

 the aperture compressed-rotund, constricted; aperture oblique, lunate, 

 subovate-triangular; peristome thick, reflexed, margins approximat- 

 ing, the outer sinuously subdentate, the columellar arcuate, appressed > 

 closing the umbilicus with a- moderate callus. 



Diam. 19i, alt. 11 mill. 



Quaternary deposit at Anaga, Teneriffe. 



Intermediate between consobrina and invernicata. 



H. CARDIOBOLA Mabille, 1882. PL 47, fig. 73. 



Imperforate, depressed-subconic, destitute of cuticle and color, 

 thick, indistinctly striate, stria) now and then punctate; spire de- 

 pressed-conic, apex obtuse, minute ; whorls 5, subdepressed, rapidly 

 increasing, especially the last, separated by impressed sutures; 

 body-whorl large, from above appearing dilated near the aperture, 

 below inflated ; aperture oblique, subovate, peristome thick, slightly 



