THE SLTG AND ITS ALLIES 



165 



tentacles. Besides Helix, a very abundant cosmopolitan 

 land pulmonate is Pupa. 1 Being of small size, it is, how- 



* 



FKJ. 151. Helix nsmaralix, from Lexington, Va., collected by Professor J. L. 

 Howe, showing variation in stripes. Upper line, first figure, normal form, 

 5 stripes ; other figures of first and second lines show reduction of stripes ; 

 third line shows broader (and fewer) stripes (the last figure is very dark 

 and is poorly reproduced). The shells in the lowest line show more than 

 five stripes. From a photograph ; reduced one-half. 



ever, less commonly known. It is found in woods under 

 leaves or in old stumps and decaying logs, where it feeds. 

 The shell is many times whorled, and has a 

 blunt apex. 



Intermediate between the terrestrial and 

 aquatic pulmonates is the family Auriculidte, 

 the members of which live on the seashore, 

 in salt marshes or on rocks where they 

 may even be immersed in brackish water 



1 A little girl or doll. 



FIG. 152. Me- 

 lampus,the salt- 

 marsh snail. 

 Nat. size. Photo, 

 by \V. H. C. P. 



