174 HELIX. 



reflexed, labiate, margins subremote, the outer bidentate, columellar 

 subexcavated, longly adnate, covering the umbilicus by a wide 

 expansion. Diam. 22-23, alt. 12 mill. 



Quaternary of Ins. Teneriffe, at the lighthouse of Anaga. 

 The slightly dilated last whorl, not constricted, well developed 

 peristome and irregularly triangular small aperture separate this 

 form from its allies. 



H. GUAMARTEMES Grasset, 1857. PI. 50, figs. 81-83. 



" Imperforate, subglobose, reticulato-malleate, color very variable, 

 yellowish or brown, sometimes with five deep brown subinterrupted 

 bands ; whorls 4J, slightly convex, the last anteriorly deflected ; 

 aperture ovate-lunar ; peristome reflexed, subrnargined. shining, 

 thick, flesh-tinted. Diam. 20, alt. 12 mill." (Grasset,') 



Ins. Grand Canary. 



H. manriqidana Lowe, and If. guartemes Martens are synonyms. 



Specimens of this form before me are thinner and of lighter text- 

 ure than H. consobrina. They are frequently unicolored ; and the 

 peristome is not (generally) so heavy ; its upper margin is highly 

 arched, subangular ; and the whole shell is finely granulose, as in 

 the allied species. 



H. INVERNICATA Mousson, 1872. PI. 50, fig. 86. 



Imperforate, depressed subglobose, striatulate, irregularly mal- 

 leate, obsoletely microscopically granulate, very bright, brownish 

 yellow, with four or five brown bands, streaked and maculated with 

 yellow; spire obtusely convex, regular; apex minute, brownish purple, 

 smooth; sutures simple, subimpressed, whorls 4J, rather rapidly in- 

 creasing, slightly convex, the last large, descending, rounded, inflated, 

 slightly constricted, below lighter colored, and slightly impressed in 

 the center; aperture oblique, subample, transversely irregularly oval ; 

 peristome acute, moderately reflexed, thickened within, margins 

 subconverging, the upper subsinuately incurved, basal margin 

 slightly curved, nearly straight, thickened, at the insertion, adnate. 



Diam. 21, alt. 12 mill. 



Ins. Teneriffe, Canaries. 



The original description is translated above. Of this species 

 Wollaston says : "I cannot feel absolutely satisfied that it is more 

 in reality than a smaller and ungranulated race of the consobrina, 

 in which the transverse lines of growth are a trifle less evident and 

 the malleations a little more so, and in which the surface is altogether 



