HELIX-AMPELITA. 51 



yellowish with three broad chestnut-reddish bands, vermiculated 

 with yellowish ; costulate-striate, especially at the sutures, and under 

 a lens with spiral lines; spire conic, a little prominent, subacute, 

 the apex obtuse, striatulate, shining; whorls 5, convex, pretty 

 regularly and very rapidly increasing, separated by impressed 

 sutures ; the last whorl large, a little convex below the suture, then 

 superficially impressed, then turgid-angulate ; beneath rather convex, 

 obtusely angulated around the umbilicus, at the aperture dilated and 

 suddenly deflexed ; aperture oblique, lunate, oblong ovate ; peristome 

 white, a little thickened, reflexed ; margins subapproximating, joined 

 by a thin callus, the outer incurved,* then substraightened, with a 

 tubercle in the middle, much dilated and projecting; columellar 

 margin obliquely incurved, narrowly reflexed. Alt. 18, greater 

 diam. 32, lesser 25J mill. A conic-depressed shell, solid, a little 

 transparent, shining ; ornamented with 3 blackish chestnut bands, 

 on a bright yellow ground. Spire regularly conical, a little acumina- 

 ted at summit. Shell striate, the strise being more apparent at 

 suture than in the middle of the whorls; the last whorl is convex at 

 the suture, then depressed, finally becoming inflated and rounded 

 beneath, the base visibly compressed. Umbilicus middling sized, 

 well opened, suddenly contracted and then penetrating. (Mabille, 



1. c., p. 148.) 



Madagascar. 



Doubtless either a synonym or at most a variety of H. hova 



/ */ / 



Angas. 



H. erythromorpha Mabille. Shell moderately and perviously um- 

 bilicated (umbilicus rounded), depressed-orbicular-convex, solid, 

 slightly thick, white under a brown deciduous epidermis, costulate- 

 striate, very minutely punctulate under a lens ; bifasciate , spire 

 regularly conic, prominent, apex valid, obtuse; whorls 5*, a little 

 convex, pretty regularly increasing, separated by a suture impressed 

 around the last whorl ; last whorl very large, flattened-sloping above, 

 rotund-angular at the periphery, not descending at the aperture, en- 

 circled by a narrow purple zone at the suture and another wide one 

 at the periphery, complanate beneath, angulated around the umbil- 

 icus and tinged with blackish-purple ; aperture scarcely oblique, 

 lunate, ovate; peristome shining, partly whitish, partly purple 

 tinged, narrowly reflexed and thickened, obtuse, margins subap- 

 proximating, outer a, little expanded, scarcely arcuate, nearly 

 straightly descending, columellar very short, scarcely arcuate, basal 



