HELIX-AMPELITA. 43 



H. (Ampelita) percyana SMITH, Proc. Zool. Soc. Lond., 1880, p. 

 485 ; pi. 48, f. 12, 12a ; L c., 1882, p. 382. 



The ornamentation of this pretty species is very peculiar. The 

 narrow zigzag lines are irregular in their disposition, and of the 

 same opaque creamy color as frequently adorns many of the Philip- 

 pine Island Orthostylus. The granules which cover the entire 

 surface are disposed in somewhat irregular closely-set transverse 

 series, interrupted considerably by oblique lines of growth. The 

 texture of the shell is thin, and so transparent that the fulgurations 

 of the exterior are quite conspicuous through the lilac interior of the 

 aperture. Sometimes the expanded outer lip is of a livid purple 

 color. (Smith.) 



H. GRANULOSA Ferussac. PI. 7, figs. 92, 93, 94. 



Shell orbicular-depressed, with very obtuse apex, obtusely angled 

 at the periphery, brownish-white, base perforated by a very broad 

 umbilicus; whorls 6, convex, granulose, separated by a profound 

 suture; aperture ovate, subhorizontal, margins much approaching, 

 laterally intiexed. (Desk.) Alt. 17, diam. 45 mill. 



Near Diego-Suarez, Madagascar. 



H. granulosa Fer., DESH. in FERUSSAC, Histoire, i, p. 61, t. 69H, 

 f. 7-10. PFR. Monographia iii, p. 239. 



Described from a single dead, discolored shell in the Ferussac 

 collection. The conspicuous granulation of the strise will render its 

 identification easy. Not seen by subsequent authors. 



H. SCHAERFI^E Pfeiffer. PI. 7, figs. 95, 96, 97, 1, 2. 



Shell moderately umbilicated, globose-depressed, rather thin, above 

 closely subrugose striate, sparsely malleate, encircled by numerous 

 reddish-brown bands, base shining, yellowish ; spire scarcely ele- 

 vated ; whorls 4, slightly convex, rapidly widening, the last de- 

 pressed-rounded, deflexed in front, somewhat contracted. Aperture 

 very oblique, lunate-oval, bluish inside, the bands showing through ; 

 peristome white, thickened within, blunt, the terminations approach- 

 ing, connected by a thin callus ; upper margin arched, the basal 

 elongated at the umbilicus (Do/in?.) 



Oudebosch and Bredasboscli, Cape of Good Hope. 



H. schaerfia PFR. Mai. Bl. viii, 1861, p. 73, t. 2, f. 1-3; Mono- 

 graphia v, p. 242. BENSON, Ann. and Mag. N. H. 3d. ser., xiii, p. 

 494, 1864. DOHRN, Conchylien Cabinet, p. 615, t. 178, f. 1-6. 



A species of very uncertain systematic position. Benson says : 



