236 HELIX. 



eter and altitude are about equal, and the sculpture is very sharp ; 

 but forms also occur with less rough surface and traces of the mal- 

 leation of H. aspersa. Bourguignat has called the banded form var. 

 zonata ; and has given the name of H. quincaycensis to the very narrow 

 elevated form shown in my fig. 57. An Algierian form of H. aspersa 

 is intermediate between H. mazzullii and H. aspersa in form and 

 sculpture. 



H. SUBPLICATA Sowerby, 1825. PI. 67, fig. 99, 



Iinperforate, globose-conic, thin and rather fragile (fossil exam- 

 amples heavier) yellowish brown, the upper two whorls deep dull 

 reddish brown ; upper whorls densely minutely granulate ; the last 

 1J coarsely corrugated in the direction of the growth lines ; spire 

 conic, very obtuse, the first 1-1 whorls disproportionately large; sut- 

 ure deeply impressed; whorls 3i, the last large, globose, gently de- 

 flexed anteriorly ; aperture oval, oblique, its margins converging 

 and joined by a slight (or in fossil examples very heavy) parietal 

 callus ; peristome slightly thickened, scarcely expanded, reflexed 

 and adnate over the axis. Diam. 32, alt. 32 mill. 



Ins. Porto Sando, Madeiras. 



A curious form, very distinct from ail others in the large, clumsy 

 apex, granulate surface, etc. 



*** 



Pomatia Beck, s. str:, 1837. 

 H. POMATIA Linn., 1758. PL 58, figs. 39-41. 



Perforate or umbilicate, globular, strong, opaque, yellowish brown 

 or whitish, indistinctly marked with four darker zones of variable 

 width ; coarsely, irregularly obliquely striate, decussated with mi- 

 croscopic impressed lines; spire short, conoid, apex blunt, apical 

 whorl smooth, shining; sutures w r ell impressed ; whorls 41, convex, 

 the last very large, globose, rapidly widening, indented around the 

 umbilicus, scarcely deflexed anteriorly; aperture oblique, oval- 

 lunate ; peristome slightly expanded, somewhat thickened, the co 

 umellar margin reflexed above the umbilicus ; parietal wall, interi 

 of aperture and columella white or light flesh color. 



Diam. 45, alt. 45 mill. 



Middle and Northern Euro) 



The synonymy includes the following names: H. antiquoru 

 Leach, pomaria Mull., scalar is Mull., sphceralis Hartm., lucorn 

 Studer, mutata Hartm. and inflata Hartm. 



