HELIX-HELICOPHANTA. 67 



under a strong lens seen to be minutely granulate ; the granula- 

 tion is indistinct on the last whorl, but dense and distinct on the 

 inner ones. Spire flat, tip of the apex a trifle sunken. Whorls 4, 

 the inner three forming the nucleus, which is densely, microscopi- 

 cally granulate. The post-embryonic portion is composed of one 

 whorl or a little less ; this widens rapidly, descends throughout its 

 latter two-thirds, and has a very slight indentation around the 

 umbilical region. The aperture is oblong-truncate, very broad, the 

 upper and lower margins straightened, subparallel ; inside it is whit- 

 ish flesh colored, with an opalescent luster ; the lip and a broad 

 margin inside is dark brown ; it is very narrowly expanded, reflexed 

 at the columella, dilated over the umbilical fissure ; parietal wall 

 covered with a milky or bluish callus edged with brown. 



Alt. 45, greater diam. 70-80, lesser 52-55 mill. ; aperture, alt. 

 from basal to superior lips, 34, oblique breadth 53 mill. 



Eastern Madagascar. 



H. souverbiana FISCHER, Journ. de Conchyl. 1860, p. 210, t. 4, f. 8. 

 PFR. Monogr. v, p. 305. DOHRN in Kiister's Conchylien Cabinet, 

 p. 624, t. 179 f. 6, 7. Helicophanta Souverbiana Fischer, MOUSSON, 

 Journ. de Conchyl. 1882, p. 38. 



A beautiful species. The color is a rich chestnut-brown, with 

 narrow zones extending part way around, denuded of epidermis. 

 The form is more depressed than H. magnified,, more inflated trans- 

 versely, flatter above. It is best shown in fig. 46 of the plate. The 

 embryonic shell measures about 28 mill, in greatest diameter; 

 its junction with the body- whorl is at a point in advance of the aper- 

 ture. 



VAR. AUDEBERTI Mousson. PI. 10, fig. 28. 



Shell large, covered rimate, depressed auriform, rather thin, strong- 

 ly transversely obtuse-striate, and indistinctly encircled by obsolete 

 interrupted sulci, partly irregularly and lightly granulate, pale ful- 

 vous or yellowish, ornamented with a single blackish-brown band, 

 paler beneath. Spire very short, apex plain or a little impressed ; 

 suture moderate. Whorls 4, very rapidly increasing, the first con- 

 vex, the last very large, descending, sloping above, narrowly curv- 

 ing at the periphery. Aperture oblique (50 with axis), transverse, 

 long-oval, whitish-gray inside, the baud showing. Peristome not 

 thickened, narrowly reflexed, blackish, margins subparallel or some- 



