IIELIX-AMPELITA. 49 



H. oomorpha Mabille. Shell subrimate or imperforate, egg-shaped, 

 little thickened, solid, subshining, fulvous, bifasciate with rufous, 

 striate and densely decussated with minute tubercles in rows ; spire 

 small, semiglobose, apex subelevated, a little papillar ; whorls 4s-5, 

 convex, irregularly (the first minute, rapidly and regularly, the rest 

 very rapidly) increasing, separated by an impressed (especially 

 at last whorl) suture ; the last whorl large, equaling y 8 o the length 

 of shell, convex, inflated, slowly and for a long distance descending 

 at the aperture, a little ventricose beneath, lightly impressed around 

 the columellar area ; aperture nearly subvertical, broad-lunate, 

 bifasciate inside, and bright fuligineous; peristome white, thickened 

 somewhat, narrowly expanded-reflexed, margins joined by a very 

 thin, shining callus; the outer margin long-arcuate, columellar 

 slightly incurved, much dilated at the insertion, white, closing the 

 umbilicus. Alt. 41-49, greater diam. 62-64, lesser 43-49 mill. ; 

 aperture, including peristome 41-42 mill, long, 321-38 wide. In 

 contour it forms a pretty regular oval, narrowed at the two extremi- 

 ties. The shell, of a brownish-red, a little shining, is solid, but not 

 very thick, ornamented by a net-work of fine tubercles disposed in 

 pretty regular series ; in a fresh condition these tubercles are pilose. 

 There are two dark reddish-brown zones on the last whorl, the upper 

 one continued nearly to the apex of the spire, which is semiglobose, 

 very small, the last whorl forming nearly the whole shell. The 

 aperture is nearly parallel with the axis, large, oval, a little acute 

 posteriorly, well rounded at the base ; outer border gently curved, 

 the columellar is thick at its insertion, widely reflexed at the umbili- 

 cal region, white, and slightly tortuous. 



(Mabille, Bull. Soc. Mai. France, 1884, i, p. 146.) 



Madagascar. 



Probably belongs to Hellcophanta. 



H. catarella Mabille. Shell moderately umbilicated (umbilicus 

 funnel-shaped, subpervious, surrounded by an obtuse angle), de- 

 pressed-suborbicular convex, a little thickened, solid, shining, white 

 under a fulvescent or rufescent epidermis, regularly costulate-striate, 

 and under a lens decussated by very delicate longitudinal lines ; 

 spire convex -conic, a little prominent, apex denuded, valid, subshin- 

 ing, obtuse, whitish ; whorls 5, convex, subregularly (first rapidly, 

 the rest very rapidly) increasing, separated by an impressed suture ; 

 last whorl large turgid around the suture, more or less impressed 

 and obscurely angulated before the periphery, at the aperture very 

 4 



