32 HELIX-AMPELITA. 



H. MADAGASCARIENSIS Lamarck. PI. 8, figs. 15, 16. 



Shell umbilicate, conoid-depressed, rather thin, striatulate, pallid, 

 ornamented with two blackish-brown bands, the upper one wider, the 

 other narrower, at the periphery ; spire a little conoid ; apex obtuse ; 

 whorls 4, a little convex, the last subdepressed, dilated and somewhat 

 descending in front ; base convex, suddenly passing into the funnel- 

 shaped, narrow, scarcely pervious umbilicus. Aperture very oblique, 

 oval ; peristome somewhat thickened, narrowly expanded, the mar- 

 gins converging, basal narrowly reflexed, arcuately ascending at the 

 umbilicus. (Pfr.) Alt. 14, greater diam. 29, lesser 23 mill. 



Madagascar. 



H. madagascariensis Lam., DESH. in LAMARCK, Anim. s. Vert., 

 2d ed. viii, p. 44. PFR., Monographia i, p. 375. REEVE, Conch. 

 Icon., f. 1014. H. madecassina PER. Histoire, t. 73A, f. 2. 



An extremely rare species not seen by me, and probably allied to 

 H. robillardi Angas. 



H. ROBILLARDI Angas. PI. 7, figs. 3, 4, 5. 



Shell umbilicate, globose-depressed, rather solid, striate, white 

 under a pale horn-colored deciduous epidermis, and ornamented with 

 3 narrow brown bands (one sutural, two around the periphery) ; 

 spire convex, obtuse ; whorls 5, somewhat convex, slowly widening, 

 the last rather depressed-rounded, strongly and shortly deflexed in 

 front, subcompressed around the funnel-shaped umbilicus. Aperture 

 very oblique, ovate-oblong ; peristome narrowly reflexed all around, 

 somewhat thickened, its ends converging, connected by thin callus, 

 the right margin arched, columellar margin dilated, impinging on 

 the umbilicus. (Dohrn.') 



Alt. 18, greater diam. 32, lesser 27 mill. ; width of aperture, 17 

 mill. 



Southwest Madagascar. 



H. robillardi ANGAS, Proc. Zool. Soc. London, 1876, p. 489, t. 47, 

 f. 6, 7. DOHRN, continuation of Conchylien Cab., p. 596, t. 174, f. 

 14-16. 



The brown bands sometimes disappear on the last whorl. The 

 more prominent characters are the coloration, rounded or arcuate 

 basal lip, and the narrow umbilicus impinged upon by the columellar 



HP. 



