HELIX. 77 



wide, oblique, trilobate-lunar ; peristome narrowly expanded, outer 

 and basal margins each with a tooth. Type, H. auridens Rang. 



Martinique. 



Section V. CEPOLIS Montfort, 1810. 



Shell knperforate or narrowly umbilicate, depressed or globose- 

 depressed, opaque, striate or rugose, spire convex, low ; whorls 4J to 

 5, the last rounded or angular at periphery, deeply deflexed anterior- 

 ly, and with a dent or scrobiculation a short distance behind the 

 peristome on the periphery, producing a fold or tooth inside the 

 shell ; aperture oblique ; peristome expanded, generally toothed be- 

 low. Type, H. cepa Mull. 



Hayti ; Porto Rico. 



Subsection AVERELLIA Ancey, 1887. 



Shell broadly umbilicated, depressed, rather thin ; spire concave; 

 body-whorl rounded, very deeply deflexed anteriorly, scrobiculate 

 behind the peristome above and below ; aperture subhorizontal, bi- 

 plicate inside ; peristome narrowly expanded. Type, H. macneili 



Crosse. 



Central America. 



Subsection ANGRANDIELLA Ancey, 1887. 



Shell broadly umbilicated, depressed, subdiscoidal ; spire convex, 

 low ; body-whorl rounded, depressed, descending anteriorly ; deeply 

 scrobiculate on the base behind the aperture ; aperture very oblique, 

 oval, with a dentiform fold within the baso-columellar margin ; 

 peristome expanded. Type, H. angrandi Morel. 



Andes of Peru. 



Section VI. LUCERNA Swainson, 1840. 



Shell imperforate or umbilicate, depressed or depressed-globose, 

 usually more or less carinated at periphery, solid, opaque, brown, 

 densely granulated, the granules arranged in close series like in- 

 cremental striae ; spire more or less convex, obtuse ; apical whorl 

 planulate ; whorls 4* to 6, very gradually widening, the last more or 

 less deflexed anteriorly, generally scrobiculate behind the peristome ; 

 aperture oblique or subhorizontal ; peristome broadly expanded, 

 edentulate or bearing 1 to 5 teeth (which are usually pliciform and 

 entering) inside ; parietal wall with more or less callus, never den- 

 tate. Type, H. acutissima Lam. 



Jamaica. 



