IIKUX. 1!7 



creasing- the last not descending; base slightly convex; aperture 

 oblique, lunar, peristoinc straight, mar-ins remote, tin- right >hnrt, 

 simple, the basal sensibly thickened toward its insertion, and briefly 

 ascending. Diam. 11, alt. S mill. 



Wit/Ha/, A 



None but the original specimens (communicated to Pfeifler \t\- Mr. 

 Cuming) are known. It seems to be near II. <-itI<l,>n'<innn in form, 

 but differs from all Lcjitu.ri* of the Azores in the solid texture. 

 Pfeiffer's, description is translated above. 



H. TERCKIHAXA Morelet, 1857. PL 51, figs. 36-",*. 



Imperforate, depressed-Conoid, slightly solid, densely, rather rude- 

 ly striate, and covered with an excessively minute granulation, cor- 

 neous brown, variegated with maculations and streaks of opaque 

 pale yellowish ; whorls C>, somewhat convex, with well marked su- 

 tures, slowly widening, the last obtusely angnlate; hase somewhat 

 flattened, indented in the center, anteriorly briefly descending : aper- 

 ture oblique, ovate-lunar, peristomc straight, margined within, slight- 

 ly expanded, livid; outer margin acute, columellar callous^ flatten- 

 ed, entering. Diam. 12, alt. 7 mill. 



7//x. Ti-i'fi-ii-n. A 



Allied to II. cnMeir'D'inn, but less diaphanous, more coarsely and 

 roughly striate, and the columellar margin, toward its insertion, is 

 broader, owing to the larger umbilical perforation covered by its 

 expansion. 

 H. DROUETIASA Morelet, 1860. PL 51, figs. 29-31. 



Imperforate, globose-conic, somewhat solid, rtigose-striate. yellow- 

 ish, variegated with corneous radiations and a blackish interrupted 

 peripheral fascia ; spire conic, apex rather acute; tfhoris 6, slightly 

 convex, the last briefly descending; aperture ovate-lunar, marbled 

 with white within; peristome obtuse, labiate, the wperiot margin 

 scarcely expanded, the columellar flattened, entering. 



Diam. 13, alt. 9 mill. 



./;/*. Fayal, .1 



In this form the corneous surface is almost covered by the opaque 



yellowish-white markin-s (which in /f. ^on'monly speckle the. hell, 

 the spire is conic, as in H. caldeirarum, and the shape ol 

 which is indented in the center, is very similar to that B pe< 

 aperture is broader than long, and the peristome l.vid m col 

 variegated appearance reminds one of //. erubescent; and 

 sion is inrreased by a very slight malleation. 



