HELIX. 177 



" It is much smaller than H. gomerensis and rather more globose 

 in contour ; but in color and sculpture it has much in common with 

 that species. It is however, more opaque above (the minute sand- 

 like granules with which it is closely beset being perceptibly coarser 

 and more defined) ; and its color is of a dull olivaceous coffee-brown, 

 rather than of a reddish castaneous." ( Wollaston.) 



H. INDIFFERENS Mousson, 1872. Unfyured. 



Im perforate, depressed globose, striate, in part obliquely undulate- 

 rugulose, irregularly grauulose, destitute of color; spire obtuse sub- 

 conic, regular, apex obtuse; suture impressed; whorls 5, moderately 

 increasing, convex, the last not dilated, well rounded, rapidly a 

 little descending, subgibbous and subcoustricted, below convex, 

 turgid in the center; aperture very oblique, regularly wide-oval, 

 not angulate ; peristome briefly expanded and reflexed, the margins 

 not converging, joined by a callus, upper and lower equally curved, 

 the latter with a rounded subthickened callus at its insertion, adnate 

 to base, with a minute tubercle on the columella. 



Diam. 21, alt. 14 mill. 



Ins. Hierro, Canaries. 



An unfigured fossil species, described from a single specimen, and 

 said to be intermediate between H. hierroensis and H. guamartemes. 



H. GUADRYI d'Orbigny, 1839. PI. 50, figs. 75, 76. 



Imperforate, thick, convex orbicular, spire slightly elevated, apex 

 reddish, last whorl rounded, angular at its origin, abruptly descend- 

 ing and slightly gibbous at its termination, and strongly constricted 

 behind the peristome, more or less irregularly striate, malleate and 

 covered with a very fine granulation, visible only under a lens; 

 bands five, slightly interrupted; aperture oval, peristome thick, 

 callus, reflexed, labiate; basal margin callous, with a lamella inside, 

 covering the umbilicus with a well developed callus. 



Diam. 22, alt. 15 mill. 



Ins. Gomera (d'Orbigny); Grand Canary. 



Two varieties are described by Mabille: Var evergeta, differing 

 from the type in the very depressed dull shell, and less thickened 

 peristome, and var. gaudryopsis remarkable for its small size, solid 

 -shell, and more marked angulation. A small form is figured (pi. 

 50, figs. 77, 78) of which Pfeiffer says, "evidentur diversa species!" 

 but which may be identical with the second of Mabille's varieties. 

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