CLASSES, ORDERS, ETC. 85 



several bands below it ; whorls six, convex ; mouth rounded, 

 purplish-brown interiorly; umbilicus narrow, deep. Height 

 Jfths inch. Downs and sandhills near the coast. Local. 



H. virgata 



(r) Shell subconical, depressed, whitish or dull yellowish-white, 

 banded with brown, solid ; whorls six, periphery bluntly keeled ; 

 spire slightly raised, with the apex tipped with brown ; mouth 

 roundish, with a strong white internal rib; umbilicus large. 

 Height -/g-ths inch. Under stones and among grass on sandy 

 soils. Somewhat local. H. caperata. 1 ^ 



(s) Shell circular, depressed, greyish or whitish, banded with 

 chestnut-brown ; whorls six, spire slightly raised with a brown 

 apex; periphery not keeled; mouth almost circular; umbilicus 

 large and open, exposing three or four whorls. Height -f^ths 

 inch. Heaths and downs near the sea. Local. 



H. ericetorum. 15 



(t) Shell depressed, circular, yellowish or reddish, regularly 

 marked with rufous brown; whorls six to seven, outer margin 

 strongly keeled ; spire slightly produced ; mouth crescent-shaped ; 

 umbilicus large and deepish. Height JV tns mcn - Under stones 

 and among decaying leaves. Common. H. rotundata 



(u) Shell sub-conical, depressed below, transverse striae oblique 

 and strong, blackish-brown ; whorls five to six, with the spire 

 somewhat produced ; mouth nearly circular, gibbous ; umbilicus 



73 v. mbglobosa, smaller, with a double band above the periphery, umbilicus 

 wider ; v. subaperta, whitish, spire more depressed, umbilicus wider ; v. 

 leucozona, violet or reddish-brown, whitish band at periphery ; v. sub mar it i via, 

 smaller, darker, slightly pyramidal ; v. carinata, strongly keeled, yellowish- 

 white, compressed above. 



71 v. ornata, smaller, whitish, with one brown band above, and two to six 

 below ; v. major, larger ; v. Gigaxii, smaller, more depressed, reddish, spotted, 

 marked by two bands below ; v. subscalaris, conical, whorls more convex : v. 

 alba, pure white, unicolor. 



75 v. instabilis, smaller, darker, spire more raised, umbilicus narrower, 

 sometimes streaked or spotted ; v. alba, white, unicolor ; v. hitescens, dirty- 

 yellowish, unicolor ; v. minor, smaller. 



76 v. alba, white unicolor ; v. Turtonii, almost flat above ; v. minor 

 smaller ; v. pyramidalis, subconical, spire more raised. 



