66 HELIX-HELICOPHANTA. 



tinct, the microscopic granulation becomes obsolete, the striae of 

 growth are far more distinct ; and numerous low, irregular, incon- 

 spicuous spiral cords appear on the surface. The whorl is very large ; 

 it descends rapidly from its beginning, and is slightly but distinctly 

 impressed at the place of the umbilicus. Aperture oblique, oblong 

 truncated, pinkish white and distinctly showing the bands inside. 

 Peristome very narrowly expanded and subrefiexed on the outer 

 and basal margins ; columella straight, vertical, deeply inserted, its 

 edge reflexed backward in a small triangular callus over the umbil- 

 ical fissure, and continued in a rather strong brown callus across to 

 the superior lip. This parietal callus shows an excessively minute, 

 regular granulation under a strong lens. 



Alt. 53, greater diam. 60, lesser 45 mill. 



Alt. 56, greater diam. 64, lesser 47? mill.; oblique alt. of aper- 

 ture, 53 mill. 



Madagascar. 



H. magnifica Fer., Histoire, t. 10, f. 4. PFK. Monographia Hel. 

 Viv. i, p. 17 ; Conchyl. Cab., p. 116, t. 86, f. 1, 2. KEEVE, Conch. 

 Icon., f. 175. CROSSE & FISCHER, Moll. Madag., t. 3, f. 1, 2.H. 

 polyzonalis LAM. An. s. Vert., p. 66. CHENU, Illust. Conch., Helix, 

 t. 1, f. 3, 4. Helicophanta polyzonalis BECK, Index, p. 46. 



In H. magnifica the shell is almost as high as broad ; the inner 

 -whorls of the spire are either almost flat or a trifle raised above the 

 penultimate whorl. The color pattern varies in the details of band- 

 ing, scarcely two specimens being alike. From all" the species of the 

 cornugiganteum group, it differs in the longer, more deeply inserted, 

 more straightened columella, and in the much more broadly ex- 

 panded last whorl. Viewed from above, H. magnifica and Souver- 

 biana have the apex more excentric than the species allied to gues- 

 tieriana, cornugiganteum, etc. Crosse and Fischer have figured a 

 specimen measuring 78 mill. alt. It is far larger than any I have 

 seen. 



H. SOUVERBIANA Fischer. PI. 12, figs. 44, 45, 46. 



Shell imperforate, globose-depressed, broad, strong and solid but 

 rather thin, opaque, chestnut colored, lighter and yellowish on the 

 earlier part of the body whorl, dark chestnut on the later part, the 

 inner whorls dark purplish-brown ; the earlier half of the last 

 whorl has several spiral bands denuded of epidermis. Surface some- 

 what shining, lightly, irregularly marked by growth wrinkles, and 



