142 HELICIDJL. 



transparent, glossy, milk-white, with numerous fine, irregular, 

 curved striae in the line of growth, which are stronger towards 

 the umbilicus ; periphery rounded, somewhat obtusely keeled in 

 immature specimens ; epidermis moderately thick ; whorls 31, 

 rapidly increasing, body whorl larger than the rest of the shell ; 

 spire very sHghtly produced ; suture deepish ; month nearly 

 circular ; outer lip exceedingly thick, greatly reflected, consider- 

 ably inflected above and below, and in full grown specimens 

 forming a complete peristome ; umbilicus large and deep. 



Inhabits most parts of Great Britain, in damp places, 

 among moss, at the roots of grass, and under stones, 

 as well as in woods on fallen branches. This species 

 is well named, for it is one of the most exquisitely 

 beautiful of our land shells, especially when it assumes 

 the form of the variety costata. Though timid, this 

 little snail is hardy, it has been found at an elevation 

 of upwards of two thousand feet above the sea-level. 

 Bouchard' Chantereaux says that during the months 

 of August and September it lays from twelve to 

 twenty eggs of a globular form. 



Var. costata {H. costata, M tiller). — Shell not so glossy, with 

 numerous transverse, curved, membranous ribs as well as inter- 

 mediate striae. 



This variety is not uncommon ; in this country I 

 have not observed it in company with the typical 

 form, but I found them living together under stones 

 in damp places on the banks of the River Arques in 

 Normandy. 



23. H. lapici'da,* LiNNfi. Pl. VIII. 



Body somewhat lanceolate, yellowish-brown above with a 

 pinkish tint in front, greyish beneath and on the tail, tubercles 

 close-set, unequal in size and placed inhnes; tentacles MQry long, 



* A stone-cutter. 



