HELIX-AMPELITA. 55 



angulated around the umbilicus; aperture oblique, ovate-oblong, 

 white inside, bright, blue-tinted, margins subapproximating ; peris- 

 tome white, thickened, broadly reflexed-convolute. Alt. 17, greater 

 diam. 51, lesser 39 mill. (Mabille, 1. c., p. 125.) 



Madagascar, coll. Ancey. 



H. paropta Mabille. Shell covered-subperforate, globose subtur- 

 binate, hardly shining, rather thick, solid, remarkably decussated- 

 rugose, white at the apex ; spire convex-subconic, rather prominent, 

 apex well-marked, complanate, rugose and lyrate ; whorls 4i-5, a 

 little convex, very rapidly widening, separated by a ruddy, im- 

 pressed suture ; the last whorl is large, convexly sloping above, in 

 front descends for a rather long distance and moderately, a little di- 

 lated, a little subcompressed, angular on the base, the angle disap- 

 pearing towards the aperture ; aperture oblique-lunate, ovate-oblong, 

 the margins subparallel, not converging ; peristome a little thick- 

 ened, whitish within, edged with lilac ; outer lip sinuous, sub- 

 straightened, then incurved, emitting a white callus over the umbil- 

 ical perforation. Alt. 18, greater diam. 35, lesser 30 mill. (Mabille, 

 1. c., p. 126.) 



Madagascar, coll. Paris Museum. 



If. subfnnebris Mabille. Shell broadly umbilicated, depressed- 

 convex, rather delicately solid, somewhat shining, purplish, clouded 

 here and there with black ; irregularly, coarsely arcuate-striate and 

 rugate ; spire convex, little prominent, apex large, complanate, shin- 

 ing; whorls 5-5 J, slightly convex, the earlier concavely impressed 

 on the lower part, visibly and subregularly increasing, separated by 

 a distinct narrowly margined suture ; last whorl large, convexly 

 sloping at the periphery, obtusely angled, dilated in front and slight- 

 ly descending, compressed beneath, with strong radiating stride, an- 

 gulated around the pervious umbilicus, scrobiculate behind the per- 

 istome ; aperture oblique, trigonal-subovate, bluish inside ; peristome 

 thickened, patulous-dilated, little reflexed ; outer lip well curved, 

 joining the basal which is thickened, a little reflexed, tuberculate and 

 straightened in a superficial angle ; columellar margin oblique, sub- 

 curved, slightly reflexed. Alt. 17, greater diam. 48, lesser 40 mill. 



(Mabille, 1. c., p. 126.) 



Madagascar, coll. Ancey. 



H. gaudiella Mabille. Shell very broadly umbilicated, depressed- 

 subdiscoidal, a little thick, solid, slightly shining, blackish-reddish, 

 with obscure grayish streaks, and arcuate, irregular striae ; spire 



