HELIX. 



specimens, slowly increasing, with moderately impressed suture; 

 body-whorl subinflated, angulated at the periphery, the an-le In- 

 coming evanescent toward the aperture, base siih-ibh,,usly inflat.-d. 

 anteriorly deeply descending; aperture oblique, transverse lunat.- 

 oval; peristome white, thickened, broadly expanded all around, and 

 reflexd, ethe margins subconverging, not connected, tlie basal margin 

 callous, distinctly plicate-dentate, with a brown spot at the insertion 

 of the columella. (KobelL) Diam. 22-1, alt. 14 mill. 



Western Sicily. 



Allied to H. provincialis, but with much more broadly reflected 

 peristome than that species. 



H. PLATYCHELA Menke, 1830. PI. 54, figs. 1-6. 



Imperforate, globose, or somewhat depressed, solid, whitish, some- 

 times unicolored, usually with four rather narrow bands composed 

 of (generally faint) brown spots, rarely subcontinuous; lightly, 

 rather irregularly obliquely marked with growth-lines, and with 

 .spiral microscopic incised lines; spire pyramidal, the apex obtuse: 

 whorls 5-5 2, slightly convex, slowly increasing, the sutures moder- 

 ately impressed ; body-whorl subglobose or somewhat depressed, 

 generally well rounded, deeply deflexed anteriorly, convex below ; 

 aperture rounded oval, very oblique, slightly darkened and usually 

 showing bands within ; peristome broadly expanded, outer margin 

 reflected, basal margin reflexed, adnate to the body toward the axis, 

 broad, flattened, with a truncated lamella or tooth within. 



Diam. 24-26, alt. 16-2-,. 



Sicily. 



H. prcetexta Jan is a synonym. 



An exceedingly variable form, easily distinguished typically by 

 the broad peristome and elevated form. There are however depress- 

 ed varieties w T hich approach globularis, etc. A small form measures 

 diam. 15, alt. 12 mill. 



Yur. ROSALIA Benoit. PL 62, fig. 53. 



Usually larger than the type, whorls of the spire planulate, eari- 

 mite, the last rounded ; base more convex ; peristome less broadly 

 expanded and reflexed. Diam. 26, alt. 19 mill. 



Palermo- 



Yar. IPARIA Benoit, PL 64, figs. 23, 24. 



Depressed ; whorls of the spire planulate ; body-whorl more or 



less keeled. 



I'ttfermo. 



14 



