22 HELIX-AMPELITA. 



suture profoundly impressed, subcanaliculate ; whorls 4, moderately 

 rapidly widening, the embryonic 1J yellowish-white, plane, the 

 following deflexed a little above the middle, subexcavated, the last 

 whorl at first descending then ascending, obtusely angulated above 

 the middle ; base subplanate ; umbilical area granulate-striate, deep 

 chestnut-brown, bounded by a narrow whitish, brown-edged zone. 

 Aperture almost horizontal, large, bluish-white within ; peristorne 

 very broadly reflexed, bluish-white, margins joined by a very thin 

 subhyaline callus ; columellar margin very short, narrower, outer 

 margin very wide. ((?.< jP.) 



Alt. 17, greater diam. 44, lesser 33 mill. 



Madagascar. 



H. sganziniana C. and F., Journ. de Conchyl. 1876, p. 167. 

 PFR. Monogr. vii, p. 593. 



Intermediate between H. lanx and H. sepulchralis ; the last 

 whorl is deflexed and then rises again ; spire planate ; suture pro- 

 found ; aperture broad. If. stragulwn and If. subsepulchralis are 

 also closely allied. ( C. & jP.) 



H. EXCORIATA Martens. 



Shell umbilicated, depressed, radiately obliquely striatulate and 

 lightly granulose, of a bay color variegated with whitish decortica- 

 ted fascicles ; spire almost plane ; whorls 4J, rapidly increasing, sut- 

 ure rather deep, last whorl flatly rotund, at the aperture at first 

 descending and then ascending again ; umbilicus rather broad, fun- 

 nel-shaped, perspective ; aperture very oblique, transverse-oblong, 

 peristome reflexed, bluish-gray, margins converging, the outer much 

 dilated, basal nearly straight, subcalloused. (Mart.) 



Alt. 23, greater diam. 60, lesser 45 mill. ; aperture, diam. 39, ob- 

 lique alt. 27 mill. 



South Betsileo, Madagascar. 



H. excoriata MART. Jahrb. d. Deutsch. Mai. Ges. 1883, p. 82. 



Evidently a member of the sepulchralis group. It has not been 

 figured. 



H. SUBSEPULCHRALIS Crosse. PI. 3, figs. 46, 47 ; pi. 62, figs. 36, 37. 



Shell broadly umbilicate, turbinate-depressed, solid, nearly smooth, 

 or marked by very slight unequal oblique striae. Color white, with 

 spiral zones of blackish-brown, under a very thin, rather evanescent 

 fawn-yellow cuticle. Spire short. Suture impressed. Whorls of 

 the spire moderately convex, very rapidly increasing ; the last whorl 



