28 HELIX-AMPELITA. 



suture, striatulate and with indistinct spiral lines ; last whorl some- 

 what distinctly carinated, a little descending in front, slightly more 

 convex beneath, subangulated around the umbilicus and distinctly 

 striated ; slightly compressed at the aperture, not constricted. 

 Aperture very oblique, transversely oval, a little excised ; throat 

 livid ; peristome narrowly reflexed, brown, margins converging, the 

 columella sub-retracted. Alt. 17J-2H, diam. 37-40 mill.; aperture, 

 alt. 151-16, breadth 18*-19J mill. (Boettger.*) 



Forest of Loucoube, Island of Nossi-Be. 



H. omphalodes var. Loucoubeensis CROSSE, Journ de Conchyl. 

 1881, p. 195. H. omphalodes Pfr., REEVE, Conch. Icon., f. 184. 

 Ampelita lucubeensis Crosse, BOETTGER, Nachrichtsbl d. Deutsch. 

 Mai. Ges. 1889, p. 46. 



I do not regard it as impossible for this to be a unicolored variety 

 of H. omphalodes; the var. intensior of H. calypso is a parallel 

 case. It is, however, restricted to the Island of Nossi-Be, while the 

 typical form inhabits Madagascar proper. I have taken Reeve's 

 figure of H. omphalodes to represent Mr. Crosse's variety. 



H. CALYPSO Pfeiifer. PL 2, fig. 37. 



Shell umbilicate, depressed, rather solid, closely striate, tawny, 

 w r ith a rufous band at the suture ; spire little elevated, obtuse ; 

 whorls 4, a little convex, regularly increasing, the last not descend- 

 ing in front ; periphery subcarinated ; below more polished, reddish- 

 yellow, subangular around the funnel-shaped umbilicus, which is 

 brown inside. Aperture very oblique, irregularly oval, whitish- 

 pearly inside ; peristome pale lilac, the margins converging, upper 

 flexuous, expanded and a little reflexed, basal narrowly reflexed, 

 columellar margin ascending nearly vertically. (Pfr.) 



Alt. 14, greater diam. 36, lesser 29 mill. 



Madagascar. 



H. calypso PFR., Proc. Zool. Soc. London, 1861, p. 386, t. 37, f. 

 8 ; Monographia v, p. 403. 



Var. INTENSIOR Pilsbry. PL 4, figs. 61, 62, 63. 



I refer to Pfeiffer's species, as a variety, the shells figured on my 

 plate, fig. 63 representing the type. It is compact, solid, strong, 

 opaque, of a deep chestnut or chocolate color all over, but lighter, 

 tawny, on the inner whorls. The surface is slightly shining, with 

 irregular wrinkles of increment, and under a lens a few minute, 

 scattered granules may be seen ; beneath it is more polished, with 



