CLASSES, ORDERS, ETC. 87 



19. Bulimus. Shell oval or oblong-ovate; spire blunt, but 

 much more prominent than in Helix ; mouth an elongated oval ; 

 umbilicus very small. Tentacles shorter than in Helix. 



(a) Shell oblong, conical, light brown or dark brown ; whorls 

 six and a-half to seven and a-half, compressed, the body-whorl 

 occupying slightly less than half the shell ; spire tapering, blunt ; 

 mouth oval, pinkish or brownish inside, and with a thick peris- 

 tome which is reflected over the umbilicus; umbilicus narrow, 

 deep. Height -|ths inch. Among fallen beech leaves in the 

 southern and western counties. B. montanus. 



(b) Shell oblong, oval, brown, more glossy than B. montanus ; 

 whorls six and a-half, rounded ; spire elongated, blunt ; mouth 

 oval, with a white, reflected peristome ; umbilicus narrow, but not 

 deep. Length 3^ lines. Among moss and stones in woods and 

 hedge-banks. Moderately common. B. obscurus. 81 



20. Pupa. Shell cylindrical or oblong, with many narrow 

 whorls ; mouth oval or lunate, generally toothed within. ; peris- 

 tome incomplete, thickened, reflected; umbilicus very minute. 



(a) Shell sub-cylindrical, solid, rufous-brown, conical ; whorls 

 eight to nine, spire produced ; mouth semi-oblong, with eight or 

 nine denticles ; umbilicus small, oblique. Height -^g-ths inch. 

 On rocks and at roots of trees in calcareous districts. Local. 



P. secale.^ 



(b) Shell ovate, conical, sub-cylindrical, light brown or yellow- 

 ish horn -colour ; whorls six to six and a-half; mouth sub-semi- 

 circular, with seven or eight reddish plications ; umbilicus oblique, 

 distinct, narrow. Height 2 T tns mcn - Among moss and dead 

 leaves, under stones. Local. P. ringens. 



(c) Shell oblong, sub-cylindrical, glossy, yellowish-brown or 

 dark horn-colour ; whorls six to seven, rounded ; mouth semi- 

 oval, with a single denticle at the angle formed by the junction 

 of the outer lip, which is broad and much reflected ; umbilicus 



alternating with brownish-grey streaks ; v. bizona, greyish or whitish, striae 

 obliterated, with two dark bands on the body- whorl. 



81 v. albinos, whitish, unicolor. 



82 v. edentula, peristome without teeth ; v. alba, white ; v. Boileausiana, 

 larger denticle entirely double, with a supernumerary projecting denticle at the 

 angle of the columellar border. 



