196 HELIX. 



acute, distinctly rosy, margins separated ; columella substraight 

 oblique, forming a slight angle at its junction with the basal lip. 



Diam. 10-12, alt. 8 mill. Ins. Brava, Cape Verdes. 



" The H. subroseotincta in its small size and totally ungranulated 

 surface has more in common with the H. bollei than it has with the 

 leptostyla. Nevertheless, it is thicker, whiter and more calcareous ; 

 its peristome has nearly always a faint rosy tinge (indeed the entire 

 shell is often suffused with a faint rosy brown); its volutions, the 

 lia-al one of which is not quite so perceptibly keeled, are a trifle 

 more tumid, and the suture consequently somewhat more impressed ; 

 its columella is just appreciably straighter, forming somewhat of an 

 angle at its junction with the lower lip ; and its entire surface has a 

 tendency to be irregularly blotched, or freckled, with very obscure 

 paler, frequently confluent patches." ( Wollaston') 



(Species of the Azores Islands') 



H. AZORICA Albers, 1852. PL 51, figs. 5-8. 



Imperforate, depressed-globose, very thin, transparent, faint gold- 

 en, speckled with dots and short oblique marks of opaque whitish 

 buff, and generally with traces of brownish faciation about the per- 

 iphery, very delicately striate ; spire short; suture moderately im- 

 pressed ; whorls 5, slightly convex, rapidly increasing, the last glo- 

 bose, convex, gently deflected anteriorly ; base slightly indented at 

 center; aperture rotund-lunar, as long as wide, oblique ; peristome 

 slightly thickened with white, ends remote ; columella thin, deeply, 

 vertically entering, well curved. Diam. 11-13, alt. 7-8 mill. 



St. M'irui mid San Miguel, Azores. 



H. CALDEIRARUM Morelet et Drouet, 1857. PL 51, figs. 39-41. 



Differs from azoriea in being of thicker texture, more decidedly 

 striate, with more depressed body-whorl, and more conical spire. 

 The surface is nearly free from opaque white markings ; the whorls 

 number nearly 6, and the increase in width is very gradual ; the 

 aperture is broader than long, the peristome labiate with white, the 

 the collumella much more oblique than in H. azoriea; the base is 

 rather flattened, and decidedly indented in the center. 



Diam. 11, alt, 7 mill. 



San Miguel, Azores. 



H. NIPHAS Pfeiffer, 1857. Unfigured. 



Imperforate, globose-conic, solid, plicate-striate, white; spire con- 

 vex-conic, apex obtuse; whorls 5*, slightly convex, gradually in- 



