HELIX-HELICOPHANTA. 61 



by the lip; the base is decidedly flatter than in any other species. 

 I do not believe that the H. vesicalis of Lamarck, figured by Ferus- 

 sac and Chenu, is the same. 



H. BETSILEOENSIS Angas. PL 10, figs. 32, 33. 



Shell large, umbilicate, very broad and depressed, solid, opaque, 

 chestnut shading to chocolate color, the inner whorls and first part 

 of the last closely dotted with golden yellow. Surface shining, 

 smooth, the inner whorls granulate, the granulation extending upon 

 the body-whorl for a distance along the suture ; under a high power 

 a pattern of excessively minute close scratches may be seen upon the 

 apparently smooth surface. The spire is very much depressed, al- 

 most plane ; suture impressed. Whorls 4^, rapidly increasing, the 

 last very large, very convex, broad and transversely inflated, its last 

 third descending ; base very convex, deeply, broadly excavated 

 around the open umbilicus. Aperture oblique, oval-truncate, blue 

 inside; peristome scarcely thickened, white, narrowly expanded all 

 around, the terminations converging, joined by a closely granulate 

 callus, the columellar termination expanded, dilated somewhat over 

 the umbilicus. 



Alt. 45, greater diam. 83, lesser 62 mill. Greatest width of aper- 

 ture 51 mill. 



S. E. Betsileo ; Tanala country, Madagascar. 



H. (Eurycratera*) betsileoensis ANGAS, Proc. Zool. Soc. Lond. 1879, 

 p. 728, t. 57, f. 1, 2. 



This species is easily distinguished from H. cornugiganteum by its 

 more depressed upper surface, much less oblique aperture, darker 

 coloration, and less concealed umbilicus. The epidermis is rather 

 thick and strong, and the surface free from the fine oblique wrink- 

 ling or malleation shown by the cornugiganteum. The parietal cal- 

 lus, upper and columellar lips are rather coarsely granulated. 



H. IBARAOENSIS Angas. PI. 13, figs. 49, 50. 



Shell large, depressed -globose, imperforate or very narrowly 

 rimate, solid, opaque, olive-yellow, with dark chocolate-brown 

 spiral bands, the entire surface becoming deep chocolate on the 

 latter part of the body-whorl, almost black just back of the lip, all 

 of the whorls except the last one (in the specimen before me) eroded, 

 destitute of epidermis and of a dull reddish-brown color. Surface 

 shining, the first part of the body-whorl minutely granulate both 

 above and below, the granulation becoming obsolete on the latter 



