74 THE DISPERSAL OF SHELLS. 



several similar instances. While writing (March) I 

 received a living frog from Lincolnshire (through the 

 kindness of Mr. Davy) together with a specimen of 

 6^. corneuin, which when packed up was clinging to one 

 of the toes, but had become detached during the 

 journey : the specimens had been obtained by Mr. 

 Woodthorpe, one of the members of the Naturalists' 

 Society at Alford^ from a batch of frogs which were 

 spawning in a ditch in that parish ; five or six other 

 frogs similarly encumbered had been seen in the ditch, 

 all the shells being attached to toes of the hind legs. 



FIG. 5. 



Sphcerhini comeum upon the toe of a Toad ; taken from a pond on Hampstead Heath, 

 and now in the British Museum. 



The Rev. R. C. Douglas, in 185 1, recorded the finding 

 of a toad, in June, crouching on the marshy edge of a 

 fish-pond, with the middle toe of one of its hind feet 

 held between the valves of a " mollusk about half an 

 inch in diameter, Cyclas cornea, I think ;" locomotion on 

 the part of the toad, he says, was effectually impeded.^ 

 Mr. J. Peers, who wrote from Warrington in 1865, while 

 dredging in April in a pond in which both toads and 



^ R. C. Douglas, "Zoologist," ix. (1851), 3210. 



