HELIX. 21 



rounded ; peristome acute, strongly labiate within, margins distant, 

 with a slight connecting callus. Diam. 6'7 mill. 



Canary Is. 

 It is H. Lancerottensis of Orb. Moll. Canaries, text but not figures. 



H. MICHAUDI, Desh. PI. 4, figs. 45, 46. 



Subcovered perforate, rugosely striate, shining, brownish white, 

 with three continuous chestnut bands; whorls 7, slightly convex, 

 the last not descending, periphery rounded, base scarcely more con- 

 vex than above; peristome acute, labiate within. Diam. 10-12 mill. 



Porto Sancto, Madeiran Is. 



H. bicolor, Lowe is synonym. 



H. LEMNISCATA, Webb and Berthelot. PI. 4, figs. 47-49. 



Covered perforate, obliquely distinctly striate, brownish white or 

 yellowish, banded with chestnut or chocolate, bands sometimes 

 interrupted; whorls 6, slightly convex, the last not descending in 

 front, periphery obtusely angulated, base flattened convex, peristome 

 acute, slightly chestnut-lipped within. Diam. 9 mill. 



Grand Canary Isl. 

 H. ATOMATA, Menke. PI. 4, figs. 50-52. 



Evidently a young shell, possibly of H. tumulorum, Webb and 

 Berth. 



Hob. unknown. 



Unfigured Species. 



H. UMBICULA, Shuttl. Canary Is. 



H. Rosetti, and H. phalerata of Pfr. (not Webb and Berth.), are 

 synonyms. 

 H. WATSONIANA, Wollaston. Grand Canary, and Teneriffe Is. 



Subsection VII, XEROLEUCA, Kobelt. 1877. 

 H. TUNETANA, Pfr. PL 4, figs. 53, 54. 



Moderately umbilicated, solid, opaque, roughly granular, yellow- 

 ish brown , whorls 4, plane above, exserted and compressly carinated, 

 the last not descending, base somewhat convex, angulated round the 

 umbilicus; peristome subsimple, the base thickened and reflected. 

 Diam. 18 mill. 



Tunis. 



H. TETRAGONA, Morelet. PL 4, figs. 55-57. 



Widely umbilicated, rather thin, striated, greyish; whorls 4, 

 flattened above, suture margined, periphery acutely carinated, base 



