HELTX. 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. Unfigured. 



I m perforate, depressed globose, striate, in part obliquely undulate- 

 'ugulose, irregularly granulose, destitute of color; spire obtuse sub- 

 >nic, regular, apex obtuse; suture impressed; whorls 5, moderately 

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

 little descending, subgibbous and subcoustricted, below convex, 

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

 lot angulate; peristome briefly expanded and reflexed, the margins 

 )t converging, joined by a callus, upper and lower equally carved, 

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

 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 

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



[. GUADRYI d'Orbigny, 1839. PL 50, figs. 75, 76. 

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

 Idish, hist whorl rounded, angular at its origin, abruptly descend- 

 and slightly gibbous at its termination, and strongly constricted 

 ih hid the peristome, more or less irregularly striate, rnalleate and 

 >vered with a very fine granulation, visible only under a lens; 

 inds five, slightly interrupted; aperture ' oval, peristome thick, 

 11 us, reflexed, labiate; basal margin callous, with a lamella inside, 

 >vering 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 

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

 'ri.<tome, and var. gaudryopsis remarkable for its small size, solid 

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

 50, l'm>. 77, 78) of which Pfeiffer says, "evidentur diversa species /" 

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

 12 



