26 THE DISPERSAL OF SHELLS. 



tion."^ Some Limnccce, &c., we must remember in 

 connection with these facts, are not altogether incapable 

 of migration on land, for they are nearly amphibious ; 

 Limncea peregra^ for instance, Mr. Jeffreys states/ as 

 its name imports, is " fond of wandering and seeing a 

 little of the world," and LimncEa truncatula, it is even 

 said, is " more frequently met with out of the water 

 than in it." 



1 *' Life, Letters, and Journals of Sir C. Lyell, Bart.", ii. (1881), 

 209, 212, in letters dated 1856. 



British Conchology," i. (1862), 107, 116. 



2 't 



