HELIX. 153 



brown bands ; spire conic, rather obtuse ; whorls 5, slightly convex, 

 the last inflated, deflexed anteriorly; aperture large, oblique, 

 rounded lunate, submargaritaceous within ; peristome thin, labiate 

 with flesh-color, margins converging, the right briefly reflexed, the 

 columellar dilated, adnate. Diam. 24, alt. 15 mill. 



Ins. Fuertaventura, Canaries* 



A very rare species, which Wollaston believes to be the same as a 

 large variety of H. pouchet. It is probably, however, distinct. My 

 description is a translation of PfeifFer's. 



H. CHERSA Mabille, 1882. PL 49, figs. 32, 33. 



Imperforate, depressed orbicular, solid, opaque, scarcely shining,, 

 grayish rufescent, with equidistant laminar costulre, the interstices 

 rugose or minutely granulate, sometimes with a brown line around 

 the periphery ; spire depressed conic, apex large obtuse, rugulose ; 

 whorls 4-5, the upper slowly, the remainder very rapidly increasing,, 

 separated by a linear suture, becoming impressed at outer whorl ; 

 body-whorl large, carinate, compresso-inflated toward the aperture,, 

 convex below, briefly, suddenly descending ; aperture lunate, elon- 

 gate-ovate, margins approximating, peristome livid, broadly and 

 flatly expanded, acute, subreflexed, thickened within, outer margin 

 regularly curved, the columella substraightened, with a long sub- 

 denticle within, and appressed at the insertion. 



Diam. 23, alt. 10 mill. 



Ins. Teneriffe, Canaries* 



Intermediate between plicaria and benthencourtiana ; differing^ 

 from the first in the more depressed shell, with smoother costa?, the 

 intervals transversely wrinkled and presenting traces of hairs, the 

 the thicker shell, dilated last whorl, and form of the aperture; from 

 the second, the thick shell, depressed-angulate form, and different 

 sculpture separate it. 



H. BATHYCOMA Mabille, 1882. PI. 48, figs. 98, 99. 



Imperforate, depressed subglobose, rather thick, opaque, scarcely 

 shining, brown, with four deeper colored bands, costulate-striate, 

 young densely squamosely pilose, adults asperate with squamose- 

 granulations ; spire convex, apex rugose, obtuse, purplish ; whorls 

 4:1-5, convexo-depressed, regularly, rapidly increasing, separated by 

 impressed sutures; body- whorl large, rounded, anteriorly constricted, 

 rapidly descending ; aperture oblique, lunate, wide, irregular oblong- 

 lunate, margins subapproximating ; peristome acute, deeply labiate 

 within, purplish flesh-colored, broadly reflexed, outer margin arcuate, 



