TRANSPLANTATION OF BIVALVES. 73 



frog with a shell of the same species attached to the 

 outer toe of one of its hind legs was found by Mr. Crick, 

 in the spring of 1882, by the side of the pond, 

 presumably near Northampton, in which, a fortnight 

 before, he had taken the water-beetle and shell referred 

 to above. The frog's leg was cut off, and the shell 

 continued to cling for two days, during which it was 

 kept in water, but, on being left in the air, the leg soon be- 

 came shrivelled, and the shell, being still alive, detached 

 itself^ Mr. Goulding, in 1884, found a frog with the shell 

 of a Cyclas (probably 6". corneum) upon one of its toes 

 in a pond near Louth.^ Mr. Hudson tells me that he 

 once saw one, swimming in a pond at Redcar, with two 

 shells (which were found to be those of 5. corneum) upon 

 the toes of its left hind foot ; and another, having an 

 immature Sphcerium upon one of its toes_, was seen by 

 the Rev. S. Spencer Pearce, in 1885, at low water on the 

 south bank of the Thames between Putney and 

 Hammersmith Bridges. Mr. Standen, in a letter pub- 

 lished in 1885, mentioned that he had often found these 

 amphibians with shells of 5. corneum attached/ and he 

 has favoured me with a note of a case observed sub- 

 sequently in a lake at Drinkwater Park, near Prestwich. 

 Mr. Hardy in the course of his collecting has observed 



^ See '' Nature," xxv. (1882), 529-30. 



"^ R. W. Goulding, " Science Gossip," xxi. (1885), 238-9, and see 

 also p. 249 ; a statement by me, in the " Naturalists' World," iii. 

 (1886), 61, that a newt and a frog had been noticed in the 

 neighbourhood of Louth each with a Sphcernon attached is based 

 upon Mr. Goulding's observations. 



■^ R. Standen, *' Science Gossip," xxi. (1885), 281. 



