TRANSPLANTATION OF BIVALVES. 83 



A dead water vole with one of its feet firmly held 

 between the valves of an Anodonta^ four inches in length, 

 was once found by Mr. Hardy on the banks of Mere 

 Mere, Cheshire. 



A snapping turtle {Chelydra)^ with a Unto {com- 

 planatusf), about three inches in length, clinging to 

 its lower jaw, was caught by Mr. J. E. Todd, in 1882, 

 while on an excursion along Rock River, near Beloit, 

 Wisconsin. The animals, which were out of the water 

 several rods from the river, were taken home and kept 

 in a box, and the reptile was seen to make frequent and 

 vigorous attempts to push off the clam with its fore 

 legs, but without success, for when it escaped from con- 

 finement after two or three days it carried away the 

 shell still attached to its jaw. The end of the jaw 

 probably reached to about the middle of the inside of 

 one of the valves, so that the mollusc would no doubt 

 be considerably injured, but, ultimately releasing its 

 grasp in a suitable place, it might possibly recover.^ 



In 1855-6 Professor Girard found numbers of small 

 bivalves attached to crayfishes {Astacus fluviatilis) in 

 ponds in the environs of Brie-Comte-Robert, Seine-et- 

 Marne. Every crayfish taken from a pond called " la 

 mare a rAnglais"had shells upon its toes; another 

 pond, close by, also contained individuals similarly 

 encumbered, and a man living at Brunoy, who was in 



^ J. E. Todd, " Chelydra versus Unio,^^ American Naturalist, 

 xvii. (1883), 428 ; see also " Nachrichtsblatt der Deutschen Mala- 

 kozoologischen Gesellschaft," 1883, p. 93 ; and I am indebted to 

 Mr. Todd for having communicated some additional particulars, 



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