86 LAND AND FRESH- WATER SHELLS. 



large, deep. Height /^ths inch. On old walls and castle-ruins. 

 Somewhat local. H. rupestris. ri 



(v) Shell very minute, depressed, nearly circular, yellowish 

 horn-colour ; whorls four, with the spire somewhat produced ; 

 mouth semilunar ; umbilicus large, deep. Height -gVth inch. 

 Among dead leaves, and under stones. Moderately common. 



H. pygmcea. 



(w) Shell nearly circular, sub-depressed, milk-white ; whorls 

 three and a-half, the body-whorl exceeding in size the rest of the 

 shell ; spire slightly produced ; mouth circular, thickened and 

 reflected so as to form a double peristome ; umbilicus large, 

 deep. Height -g^ths inch. Among stones, moss, and grass. 

 Somewhat local. H. pulchella. 78 



(x) Shell sharply keeled at the periphery, circular, depressed, 

 greyish or horn-colour, streaked regularly with rufous brown ; 

 whorls five, with the spire very slightly produced ; mouth oval, 

 surrounded by a thick white reflected rim, somewhat angulated 

 above and below ; umbilicus large, deep. Height -%- s ihs inch. In 

 hedgerows and woods in calcareous districts. Local. 



H. lapidda. 79 



(y) Shell sub-discoidal, depressed, solid, dull rufous-brown 

 hispid; whorls six and a-half; spire sunk below the level of the 

 body-whorl ; mouth triangular, marked with three protuberances, 

 and with a pinkish-white, reflected peristome ; umbilicus large, 

 deep. Height -/-gths inch. Among the moss near the roots of 

 shady trees at Ditcham Wood, Hants. Rare. H. obvoluta. 



(#) Shell turreted, conical, yellowish-white streaked with 

 brown, and with generally a reddish-brown or blackish band 

 below the periphery ; whorls eight to nine ; spire tapering, blunt ; 

 mouth oval; umbilicus narrow, rather shallow. Height -fths inch. 

 On cliffs and downs near the coast. 



H. (Cochlicella) acuta ( = Bulimus acutus).* Q 



77 v. viridescenti-alba, greenish-white. 



78 v. coslata, not so glossy, reddish with numerous transverse, membranous 

 ribs as well as intermediate striae. 



79 v. albina, whitish, unicolor ; v. minor, dwarfed. 



80 v. injlata, slightly ventricose ; v. strigata with broad, whitish ribs 



