HELIX-TURRICULA. 185 



the less rounded less steep intermediate 1 whorls, which have, however 

 the same sculpture, and (4) the last whorl descends less on the 

 penultimate, the sculpture remains the same, or becomes only a little 

 weaker ; the peripheral angle and the more or less distinct but 

 closer grains serrating it are retained, nearly to the aperture, and 

 the base is rather flat. 



See v. Martens, Conch. Mittheil. iii, p. 1, t. 37, f. 9-15 (Dec., 

 1889.) 



H. PHILAMMIA Bourg. (Vol. IV, p. 25). PI. 27, figs. 61-66. 



Bourguignat's description and figures were drawn from immature 

 examples of this species. Von Martens has given illustrations of the 

 adult form (figs. 61-63), collected by Schweinfurth in the region of 

 Galala, Egypt, near the Red Sea, at an altitude of 1300 meters. 



H. BERENICE Kobelt. PL 27, figs. 58, 59, 60. 



Shell trochoidal, narrowly umbilicated, the umbilicus nearly con- 

 cealed by the overhanging columellar lip ; solid, chalky, lusterless, 

 of a dirty buff color. Surface roughened by irregular growth-lines, 

 the inner whorls inconspicuously malleated. 



Spire conical. Whorls 6, those of the spire carinated, the carina 

 strongly crenulated, filling the suture, and sometimes slightly project- 

 ing ; on the two latter whorls the carina is obsolete and the periphery 

 rounded. Latter half of the body-whorl slowly descending ; base 

 somewhat flattened. 



Aperture rounded, slightly lunate, the breadth about equal to the 

 oblique height; peristome simple, not thickened within, the col- 

 umellar margin shortly dilated; parietal wall covered with a 

 moderate callus. 



Alt. 19, diam. 21* mill. 



Lybia (Spratt.) 



This species is also illustrated from the type, in the collection of 

 Ponsonby. It is somewhat allied to H. lybica and H. tubereulosa, 

 but is much more intimately connected with H. philammia Bgt., of 

 which it should probably be considered a variety. 



H. LYBICA Kobelt. PI. 27, figs. 53-57. 



Shell depressed, umbilicated, the umbilicus deep, cylindrical, one- 

 tenth the diameter of the shell; solid, chalky ; slightly shining, of a 

 dirty- white tint, the apex milk-white. Surface superficially and finely 

 mtted all over. 



; 

 ERSITI 

 IFORNl*, 



