234 HELIX-IBERUS. 



in Sicily and Sardinia. All are characterized by keeled whorls and 

 microscopic spiral striae. 



The following forms belong to this group : H. sultana Morel., 

 H. leachii Fer., H. quedenfeldti Marts., H. viola Pons. and H. cul- 

 minicola Kob. 



The specimens of H. sultana before me have two narrow, light- 

 brown bands below, one or none above. 



H. CULMINICOLA Kobelt, MSS. PL 28, figs. 95, 96, 97. 



Shell partly-covered perforate, depressed, thick lens shaped, very 

 strongly carinated, rather thin, soiled whitish with very faint traces 

 of three bands above, one below the keel. Surface coarsely obliquely 

 wrinkled above and below, the wrinkles occasionally branching ; 

 and under a strong lens the whole surface is densely spirally striated. 



Spire low-conic, apex obtuse. Earliest IT whorls smoother, 

 corneous-brown, forming an embryonal shell ''of 2i mill, diameter. 

 Whorls 4-4 i, convex below the suture, then concave toward the 

 peripheral keel, the last whorl wide, convex below, strongly com- 

 pressed on each side of the prominent carina, rather strongly 

 deflexed in front. 



Aperture very oblique, oval-rhombic, deeply channelled at the 

 peripheral keel ; peristome thin, white, expanded, becoming reflexed 

 at the base and columellar margins. 



Alt. 10, diam. 20-} mill. 



Highest peak of the Angera Mts., between Tangier and Tetuan 

 (John Ponsonby.) 



I am indebted to Mr. John Ponsonby for this hitherto unpublished 

 species. It agrees with H. sultana Morel, in the partly covered 

 umbilicus ; thin, adnate parietal callus, and small embryonic shell ; 

 but it differs in being smaller and far more coarsely wrinkled. It 

 agrees with H. viola in the wrinkled surface, but differs in the 

 smaller umbilicus and especially in the much smaller embryonic 

 shell. 



H. VIOLA Ponsonby. PL 26, figs. 50, 51, 52. 



Shell narrowly umbilicated, depressed, thick lens-shaped, rather 

 thin, lusterless, whitish with a faint brown band just above the 

 carina, a narrower band above it and another below the suture ; 

 below the carina there is a faint band. Surface very coarselg rudely 

 wrinkled above and below, the wrinkles oblique, irregular, sometimes 



