184 HELIX. 



subparallel, the columellar lengthily adnate, broadly expanded, 

 covering the umbilicus with a white callus. 

 Diam. 18-19, alt. 10 mill. 



Canary Is. 



Allied to H. saponacea, but distinguished by the less depressed 

 form, more elevated spire, more rapid increase of the whorls, less 

 developed peristome, etc. 



H. BITUMIXOSA Mabille, 1883. PI. 48, figs. 96, 97. 



Depressed, subglobose,thin, subfragile, slightly shining, irregularly 

 costulate-striate, especially on the last whorl, and superficially 

 malleate, all over, under a lens minutely punctulate, intensely black, 

 the apex reddish ; spire a little convex, apex minute, rugose granu- 

 late; whorls 5-6, regularly increasing, separated by a slightly 

 impressed suture, the last large, convex-rounded, obscurely angled 

 at the periphery, toward the aperture gibbous, briefly descending, 

 slightly constricted behind the peristome; aperture wide oblong- 

 ovate, oblique, lunate, fauces violaceous, margins subconverging ;, 

 peristome thin, vivid violaceous, labiate, outer margin well arched, 

 columellar subconcave, with a slightly prominent white lamina. 



Diam. 23-25, alt. 13, 14 mill. 



Ins. Grand Canary. 



H. MERITA Mousson, 1872. Unfigured. 



Imperforate, convex-orbiculate, rather distinctly moderately 

 striate and obscurely rugulose, irregularly granulate, shining, yellow- 

 ish-white, trifasciate with brown; spire obtuse, depressed conic, 

 apex flattened, very finely rugulose; suture subimpressed, not 

 marginate; whorls 4^-5, the upper flattened, rapidly increasing, 

 carinate, the last abruptly descending, subturgid at sutures, convex 

 below, subangulate, the angle disappearing on the last portion, which 

 is subgibbous and constricted ; aperture oblique, transversely sub- 

 quadrate-rounded, corneous; peristome obtuse, briefly expanded, 

 margins distant, scarcely converging, joined by a callus, the basal 

 straightened, elongate-subdentate in the middle, appressed and 

 adnate. Diam. 27, alt. 16 mill. 



Ins. Gomera, Canaries. 



Form more conic, and at the same time more depressed than its 

 allies. Only found fossil. 



