HELIX-HELICOPHANTA. 73 



H. (Helicophanta^partiiliformis'BoETTG'ETi, Nachrichtsbl. Deutsch 

 Mai. Gesellsch. 1889, p. 44.' 



This new form is separated from the allied H. Goudotiana Fer. 

 by the more slender shell, more produced spire, the two little bands 

 lying between those which encircle the middle part of the shell, the 

 oblique wrinkles of the last whorl, and the narrower, ear-shaped 

 aperture with much more thickened and reflexed peristome. H. 

 Jarafanga H. Ad., also a Madagascar species, is narrower, has higher 

 spire, finer apex, and numerous dark spiral bands. H. partuliformis 

 is separated, moreover, from all known species of the group by the 

 thickened, quite rectilinearly ascending columella, which bears in 

 the middle a distinctly convex, long, knife-shaped, sharpened callus. 

 (JBoettger?) 



I refer with some doubt to this species, the "H. amphibulima' of 

 Oosse & Fischer's Moll. Madag., pi. 1, figs. 3, 4. One of these 

 figures is copied on pi. 42, fig. 29. There seems to be no warrant 

 for reviving the name amphibulima; it has never been properly 

 characterized, and has certainly been applied to several distinct 

 species. 



Group of H. farafa nga Ad. 



H. FARAFANGA H. Adams. PI. 15, fig. 71. 



Shell large, bulimiform or pointed-ovate, im perforate, solid and 

 rather thick, pale brown, encircled by very many dark brown bands ; 

 surface dull, with irregular growth wrinkles; spire short, conical, a 

 little obtuse at apex ; suture impressed. Whorls 4$, convex, the 

 last forming the greater part of the shell, oval. Aperture ovate, 

 angled above, whitish-lilac colored and banded with dark purplish 

 inside, and having an opalescent luster ; peristome white, thickened, 

 obtuse, a trifle expanded all around, a little dilated at the place of 

 the umbilicus, the terminations connected bv a rather thick white 



v 



callus. 



Alt. 92, diam. 70 mill. ; aperture, alt. 67, width 50 mill. 



Ekongo, on the Farafanga (or Farafangane) River, S. E. Mada- 

 gascar. 



Eurycratera farafanga H. AD., Proc. Zool. Soc. Lond. 1875, p. 389, 

 t. 45, f. 1, la. DOHRN, in Raster's Couchyl. Cab., p. 622, t. 179, f. 

 1, 2. Bulimus farafanga PFR. Monographia, viii, p. 17. If. fara- * 

 fanganensis CROSSE & FISCHER, Journal de Conchyliogie, 1881, p. 

 * Moll. Madag., t. 6, f. 1 ; t. 10, f. 1. 



