HELIX. I'll! I 



specimens, slowly increasing, with moderately impressed suture; 

 body-whorl subinflated, angulated at the periphery, the angle be- 

 coming evanescent toward the aperture, base subgibbously inflated, 

 anteriorly deeply descending; aperture oblique, transverse lunate- 

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

 refiexd, ethe margins subconverging, not connected, the basal margin 

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

 of the columella. (Kobelt.) Diam. 22 i, alt. 14 mill. 



Western Sicily. 



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

 peristome than that species. 



H. PLATYCHELA Mcnke, 1830. PL 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 55-.!, 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. 24-20, alt. 16-23. 



Sicily. 

 H. prcetextu Jan is a synonym. 



An exceedingly variable form, easily distinguished typically by 

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

 ed varieties which approach globularis, etc. A small form measures 

 diam. 15, alt. 12 mill. 



Var. ROSALIA Benoit. PI. 62, fig. 53. 



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

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

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



Palermo. 

 Var. i PARI A Benoit. PI. 64, figs. 23, 24. 



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

 les.- keeled. 



Palermo. 

 14 



