20 HELIX. 



other below the periphery ; whorls 6, slightly convex, the last not 

 descending in front, periphery obtusely angulated ; peristome sim- 

 ple, acute. Diam. 7 mill. 



Ins. Teneriffe and Palma. 



H. prceposita, Mousson is a synonym. 



Var. DEVIA, Mousson. 



Somewhat larger, depressed conical, subcarinate, marbled with 

 grey and corneous above, with two bands of brown and white spots. 



H. OLEACEA, Shuttl. PI. 4, figs. 34-36. 



Subcovered perforate, thin, fragile, a little shining, striate, yel- 

 lowish brown, with a series of chestnut maculations near the suture 

 and another on the middle of the base ; whorls 5-5 1 , scarcely con- 

 vex above, the last not descending, with a peripheral carina vanish- 

 ing in front ; peristome simple, acute. Diam. 8 mill. 



Ins. Palma, Canaries. 



H. deusta, Lowe is a synonym. 



H. WOOWARDII, Tarnier. PI. 4, figs. 37-39. 



Narrowly umbilicated, thin, fragile, dull, lightly plicately striate, 

 uniform whitish- or yellowish-corneous, without bands, the plicae a 

 little paler; whorls 5, slightly convex, the last scarcely descending 

 in front, periphery angulated, the keel visible some distance up the 

 spire, base a little more convex ; peristome acute, scarcely expanded, 

 not labiate. Diam. 7 mill. 



Ins. Teneriffe. 

 H. C^EMENTITIA, Shuttl. PI. 4, figs. 40-42. 



Narrowly umbilicated, solid, dull, plicately costulate, ash colored, 

 marbled with corneous, with a single peripheral interrupted band 

 of chestnut and white spots ; whorls 6, slowly increasing, scarcely 

 convex, the last shortly deflected in front, periphery carinated, 

 carina vanishing towards the aperture; aperture banded with chest- 

 nut, peristome acute, thickened within, the margins joined by a 

 white callus. Diam. 11/5 mill. 



Canary Is. 



H. MONILIFERA, Webb and Berthelot. PL 4, figs. 43, 44. 



Subcovered perforate, somewhat solid, strongly striate, whitish 

 with one superior and two inferior bands of chestnut maculations ; 

 whorls 5-5*, slightly convex, the last scarcely descending, periphery 



