188 HELIX. 



the last descending ; aperture small, narrow-lunar ; peristome 

 slightly expanded and thickened. Diam. 23, alt. 23 mill. 



Quaternary of Madeira. 



H. vargasiana Pfr. is a synonym. 



Peristome more thickened than in H. punctulata, and form more 

 globose. These characters, together with the larger size and much 

 heavier texture seem sufficient cause for the specific separation of 

 the two forms. 



H. NITIDIUSCULA Sowerby, 1824. PI. 51, figs. 33-35, 19. 



Narrowly umbilicate, depressed globose, rather thin, yellowish 

 corneous or whitish, with three rich brown bands above: finely, 

 irregularly wrinkled and minutely granulate, smoother below; spire 

 low-conic, subacute; suture deeply impressed; whorls 5, convex, 

 the last rapidly widening, slightly descending anteriorly; aperture 

 oblique, rounded-lunar ; peristome simple, its ends converging, joined 

 by a light callus, columellar margin subreflexed, white, slightly im- 

 pinging upon the umbilicus. Diam. 13, alt. 10 mill. 



Ins. Madeira and Porto Sancto* 



H. vulgata Lowe, is synonymous. 



Var. GIRAMICA Lowe. PI. 51, fig. 35. 



Slightly larger than the type, with the two upper bands confluent,, 

 or the whole surface uniform dark brown. 



H. anaglyptica Reeve (fig. 19), is a synonym. 



H. CANICALENSIS Lowe, 1852. PL 52, figs. 72-74. 



Narrowly umbilicate, depressed conic, destitute of cuticle or color, 

 rather thickened, with fine, irregular incremental wrinkles, and 

 somewhat, though very minutely, rugose ; spire elevated, conic, the 

 apex subacute; suture profound; whorls 5, convex, the inner gradu- 

 ally, the last rapidly increasing, descending anteriorly; aperture 

 small, contracted above, oblique ; peristome scarcely thickened, the 

 terminations converging, the columellar margin about half conver- 

 ing the umbilicus. Diam. 11-12, alt. 10 mill. 



Quaternary of Canical, Madeira. 



Allied to the preceding, but more conical, with smaller umbilicus 

 and aperture; found only subfossil. 



H. LURIDA Lowe, 1851. PI. 51, figs. 25-27. 



Narrowly umbilicate, depressed, rather thin, brownish, with 

 (usually two) subobsolete spiral bands of dark brown, light mere- 



