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. PL 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 , 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. WOOWABDII, Tarnier. PL 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^MENTITIA, Shuttl. PL 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 i, slightly convex, the last scarcely descending, periphery 



