178 HELIX. 



H. GRANOMALLEATA Wollaston, 1878. Unfigured. 



"Imperforate, depressed globose, rather thin, obliquely plicate- 

 malleate, the folds very irregular, subconfluent, and minutely very 

 densely granulate with sand-like grains; above opaque, base smoother 

 and shining in the center, grayish yellow, with four or five castane- 

 ous bands, the subsutural more or less interrupted or indented 

 around its anterior margin, either one or two below the periphery, 

 and a broader band (perhaps composed of two) immediately above 

 it; spire obtuse; suture simple, impressed; whorls 5, slightly convex, 

 the last large, inflated, obsoletely carinated at its origin, anteriorly 

 deeply deflected ; aperture large, lunate-oval ; peristome acute but 

 little expanded and reflexed, superior and basal margins subequally 

 arcuate, simple, not dentate within, the terminations distant, but sub- 

 converging, joined by a callus. 



Diam. 25 mill." ( Wollaston.) 



Los Souces and Barranco de Herradura, Ins. Palma, Canaries. 



H. VERMIPLICATA Wollaston, 1878. Unfigured. 



Partly covered umbilicate, orbicularly depressed, rather thin, very 

 densely and coarsely vermiculate-plicate, the folds very irregular, 

 submalleate-confluent, and very minutely granulate, subopaque, 

 grayish white, with four or five obsolete cloudy bands, one or two 

 below, one or two immediately above the periphery, and one just 

 below the suture; spire obtuse; suture impressed; whorls 5, the last 

 large, inflated, but with a minute carina, descending anteriorly; 

 aperture lunate-rounded, terminations of the peristome remote. 



Diam. 19 mill. 



"Llanos" af the Banda, West side of Ins. Palma, Canaries. 



Described from immature examples. Wollaston says: "I feel 

 almost confident that the character of 'semiobtecta perforata' will 

 be found to hold good during all periods of growth; and such being 

 the case, its affinities, which at first sight are not readily apparent 

 will perhaps be ascertained to lie amongst the forms around the 

 H. planorbella, though, at the same time, the species has evidently 

 something in common with the (equally Palman) H. granomalleata. 

 Not to mention this peculiarity of the umbilicus, the present species 

 is smaller than H. granomalleata, and it is also rather more depress- 

 ed both above and below, and it has a fine thread-like though minute 

 keel which is traceable even down to the very aperture. It is not 

 much malleated, its sculpture consisting mainly (apart from the 

 excessively minute sand-like granules) of extremely irregular and 



