HELIX. 185, 



H. HARMONICA Moussoii, 1872. PI. 61, fig. 11. 



Imperforate, subglobose-depressed, rather solid, widely costulatc- 

 striate, very minutely and indistinctly elongate-granulate, yellowish 

 whitish, deeper colored above, bifasciate with pale brown In-low; 

 spire obtuse, somewhat convex, nucleus flattened, minutely tiraiui- 

 late, corneous; suture slightly impressed narrowly margined with 

 white; whorls 4s-5, the last depressed rotund, a little descending, 

 subinflated below; aperture very oblique, showing the bands within,, 

 lunate wide-oval; peristome obtuse, white, shortly reflexed, the 

 margins a little converging, the basal less curved than the upper, 

 appressed to the base. Diam, 22, alt. 14 mill. 



Ins. Hierro, Canaries* 



H. GOMERENSIS Morelet, 1864. PI. 61, figs. 3, 4. 



Covered perforate, depressed, thin, subtranslucent, corneous brown,, 

 with three dark bands, one near the suture, one above, the other 

 below the periphery; spire depressed conic, obtuse; suture well 

 marked ; whorls 4, apex planulate, nearly smooth, whorls gradually 

 increasing except the last, which widens very rapidly, especially 

 toward the aperture; sculpture of very minute granules all over,, 

 and fine irregular oblique striae; body-whorl angular at its origin, 

 becoming rounded and somewhat tumid below toward the aperture, 

 gradually descending anteriorly; aperture very oblique, large, trans- 

 versely oval, slightly lunate; peristome thin, acute, its margins 

 converging, the upper and lower equally arched, columella scarcely 

 thickened within, rounded, reflexed and adnate on base, with a 

 white callus over the indented umbilical region. 



Diam. 21, alt. 12 mill. 



Ins. Gomera, Canaries. 



H. THORYNA Mabille, 1882. PI. 46, figs. 66, 67. 



Imperforate, convexo-depressed, subfragile, thin, subopaque, not 

 shining, greenish tinged with rufous, with three faint bands of the 

 same color; spire convex, apex yellowish, obtuse, punctulate, whorls 

 5, flatly sloping, subregularly increasing, suture distinct, body- whorl 

 large, subacutely carinated, rounded toward the aperture, the carina 

 evanescent, and a little gibbous, very slightly constricted; aperture 

 oblique, lunate, oblong-rotund; peristome stibthickened within, acute,, 

 expanded, the margins converging, outer margin sinuous, well curved 



