92 LAND AND FRESH-WATER SHELLS. 



31. Caecilioides. Shell cylindrical, smooth, thin, glossy; 

 mouth oval, with a notch at its base; outer lip thin and not 

 reflected; umbilicus absent. 



(a) Shell fusiform, white ; whorls five and a-half to six ; spire 

 attenuated ; suture deep ; mouth lanceolate, sharply angled above, 

 notched deeply at its base. Length T 2 T ths inch. Subterranean ; 

 specimens are often found in river ejectamenta after floods. 

 Local. C. acicula. 



Family V. Carychiidse. 



Shell spiral, oblong ; mouth oval, denticulated ; umbilicus very 

 small. Eyes situated at the posterior base of the dorsal tentacles ; 

 lower tentacles rudimentary. 



32. Carychium. 



(a) Shell white, fusiform, oblong; whorls five to five and a-hnlf, 

 the body-whorl comprising nearly one-half of the shell ; apex 

 acute; mouth ear-shaped with three denticles; umbilical chink 

 oblique. Height Jth inch. Under stones, in decaying leaves, 

 and at the roots of grass. Moderately common. C. mininnun. 



Family VI. Cyclostomatidae. 



Shell cylindrical or conical, operculated ; mouth round or oval ; 

 operculum shelly or horny. 



33. Cyclostcma. Shell conical; operculum shelly. 



(a) Shell greyish or yellowish-brown streaked and blotched 

 with purplish-brown, coarsely striated ; whorls four and a-half, 

 tumid; suture deep; mouth subrotund ; umbilicus narrow. 

 Length |^ihs inch. In hedgerows and on hillsides in calcareous 

 districts. Moderately common. C. elegans?* 



34. Acicula. Shell cylindrical ; operculum horny. 



93 v. ochroleuca, yellowish, unicolor, bandless ; v. pallida, very pale 

 yellowish, with some spots and demi-effaced bands ; v, albesctns, whitish, 



