24 HELIX-AMPELITA. 



joined by a thin callus, dilated on the outer lip and toward the in- 

 sertion. ( C. & F.) 



Alt. 16, greater diam. 36, lesser 26 mill. 



Variety. Olivaceous, obscurely and sparsely spotted with yel- 

 lowish ; umbilical area chestnut, bounded by a buff zone. Alt. 16, 

 greater diam. 32, lesser 24 mill. 



Madagascar. 



H. stragulum C. & F., Journ. de Conchyl. xxi, 1873, p. 158. 

 PFR. Monographia vii, p. 453. 



Allied, say Crosse and Fisher, to H. sepulchralis Fer., but distin- 

 guished by the nearly plane spire, the shell minutely granose, last 

 whorl angulate-carinate above the periphery, base much inflated, 

 and the narrow umbilicus. 



H. HOVA Angas. PL 4, figs. 48, 49, 50, 51, 52. 



Shell umbilicate, depressed, yellow with three conspicuous bands 

 of dark brown, or sometimes bandless. 



Depressed, the spire convex; solid, opaque, straw-yellow with 

 dark brown bands at the suture, just above the periphery and on the 

 middle of the base. Surface somewhat shining, smooth, with slight 

 growth-striae, and obscure spiral lines. Spire low conoidal ; suture 

 impressed. Whorls 4, the inner convex, the last large, with a 

 depression or flattening around its upper face, descending anteriorly, 

 and with a spiral furrow within the umbilicus. Aperture very 

 oblique, white or bluish-white inside ; peristome broadly expanded, 

 and flaring above ; the basal margin narrower, ends connected by an 

 opaque white callus. Umbilicus rapidly narrowing to a small deep 

 perforation, umbilical region light colored. 



Alt. 23, greater diam. 38, lesser 28 mill. 



Alt. 18, greater diam. 27, lesser 21 mill. 



Madagascar. 



H. hova ANGAS, Proc. Zool. Soc. Lond. 1877, p. 804, t. 88, f. 4, 

 5. H. sepulchralis (in part) FERUSSAC, Histoire, t. 75 C, f. 1-3, 

 8-10. REEVE, Conch. Icon., f. 147c. PFEIFFER, Conchylien 

 Cabinet, t. 15, f. 1, 2.? H. trivittata Born (where ?) vide VILLA, 

 Disp. Syst. Conch. Terr, et Fluv. Coll. Villa, p. 15. 



This species is separated from H. lamarei and H. sakalava by the 

 different color-pattern and more widely perforated umbilicus ; from 

 H. sepulchralis by its smaller size, banded coloration, and very 

 much more contracted umbilicus, as well as its strong parietal 



