HELTX. 179 



densely-packed, coarse, subconfl uent oblique ridges, or subundulating 

 vermiform folds; and in color it would seem to be of a dingy oliva- 

 ceous-white, suffused with a darker tint in consequence of the four or 

 five obsolete bands which are indistinctly indicated." 



Mabille considers this form a variety or monstrosity of H. planor- 

 bella. 



H. AMBLASMODON Mabille, 1883. PL 48, figs. 17, 18. 



Imperforate, depressed-orbicular-convex, thick, solid, scarcely 

 shining, yellowish fulvous, with four dark black-spotted bands, 

 irregularly costtilate-striate, here and there, especially below, with 

 decurrent lines, under the lens all over finely granulate ; whorls 5, 

 very rapidly increasing, separated by rather deep suture ; body- 

 whorl large, compressed-rotund, rapidly descending and slightly 

 gibbous at aperture, scarcely gibbous at aperture, scarcely constric- 

 ted ; aperture oblique, lunate, irregularly oblong, peristome thick, 

 reflexed, acute, violaceous, margins subapproximating, joined by a 

 very thin violet callus, basal margin straightened, lengthily adnate, 

 with a strong impressed umbilical callus, tortuous columella, and a 

 white, saliant, tortuous lamina inside. Diam. 26, alt. 13 mill. 



Ins. Grand Canary. 



Resembles Macularia balearica somewhat in the maculated bands. 



H. ZORGIA Mabille, 1883. PI. 49, figs. 27-29. 



Imperforate, solid, depressed-orbicular-subglobose, slightly trans- 

 parent, yellowish, with four brown bands, interrupted with yellow, 

 irregularly costulate-striate, under the lens finely granulate and 

 very superficially malleate; spire depressed-convex, apex minute, 

 rugose, rufous ; whorls 5-5?, rapidly increasing, separated by linear, 

 obscurely margined sutures ; body-whorl slightly angled at its origin, 

 becoming rotund, a little turgid at the aperture, lightly constricted, 

 subabruptly, rapidly descending ; aperture oblique, lunate, oblong- 

 rhomboid, margins subapproximating; peristome violet-tinted, 

 subthickened, reflexed, obtuse, basal margin straightened, adnate, 

 with a prominent white lamina inside, and a wide impressed callus 

 over the umbilical tract. Diam. 24, alt. 12? mill. 



Ins. Grand Canary. 



The more prominent characters are the very solid shell, yellow 

 ground color, with wide, frequently interrupted, reddish-brown 

 bands, the thick violet colored peristome, and strong basal tooth. 



