256 HELIX. 



Has recently been referred to H. explanata as a ribbed variety 

 (Jour, de Conch. 104, 1887), but has a half whorl additional to that 

 species, although smaller. 



H. IDIA, Bourg. et Letourn. PL 62, figs. 23-25. 



Widely umbilicated, irregularly, flexuously cos tulate; whorls 4, 

 with carinated suture, last whorl very sharply carinated, cariiia 

 blade-like, umbilical region defined by a sharp angle. 



Diam. 14 mill. 



Tunis. 

 H. DEPRESSULA, Parreyss. PI. 62, figs. 6-8. 



Widely umbilicated, rugosely striate, yellowish white ; whorls 6, 

 carinated, subplanate above, last whorl whith compressed, crenula- 

 ted carina, scarcely descending in front, base convex; peristome 

 acute, labiate within. Diam. 20 mill. 



Algeria. 



H. SIGENSIS, Kobelt. PL 62, figs. 1, 2. 



Widely umbilicated, plane above, somewhat solid, chalky white, 

 or with inferior chestnut bands; whorls 5, striate-costulate, with 

 irregularly carinate suture, last whorl slightly descending in front, 

 the compressed peripheral carina white-crenulated, base inflated, 

 with whitish ribs, more distinct than above ; peristome acute, labiate 

 within. Diam. 17 mill. 



Or an, Algiers, near Nemours, at the old Portus Sigensis. 



H. Jolyana, Bourg., has been referred here. 



H. CATOCYPHIA, Bourg. PL 63, figs. 26-28. 



Eimately perforate, whitish, chalky, striate; whorls 4 , rapidly 

 increasing, planate above, the last acutely carinated, not descending, 

 base convex ; peristome acute, labiate within, parietal wall with a 

 tubercle. Diam. 10 mill. 



Chateau d'lf, near Marseilles, France. 



H. SETUBALENSIS, Pfr. PL 63, figs. 29. 30. 



Narrowly umbilicated, somewhat solid, closely lamellarly costate, 

 opaque, fulvous white; whorls 5, planulate, exserted, serrulately 

 marinated, the last not descending, base convex; peristome acute, 

 labiate within. Diam. 9 mill. 



Near Setubal, Portugal; Alicante, Spain. 



H. serrula, Morel, is a synonym. 



