1 84 THE DISPERSAL OF SHELLS. 



Dr. James Lewis is stated to have put down several 

 species taken from the Mohawk KiwQY—Melantho 

 Integra, M. rufa, Goiiiobasis niagarensis, Somatogyrus 

 isogoiiiis, etc.— at the outlet of Schuyler's Lake (about 

 eighteen miles from Mohawk), but I do not know the 

 result of either of these experiments ; an attempt made 

 by Dr. Lewis to colonize " Vivipara contectoides Binney 

 {Pal. vivipara Say) " m the Mohawk River and Erie 

 Canalj however, is said to have been eminently success- 

 ful, the species having spread widely and being now 

 ''firmly established in both the canal and river," ^ and 

 I find it stated also that BytJiinia tentacidata, planted 

 in the Mohawk River by the same naturalist, has be- 

 come very abundant, especially in the bends of the 

 river where the water runs slowly.'^ Planorbis corneus 

 and B, tentaculata, planted by Miss Esmark in Norway, 

 "increased rapidly;" Limncca stagnalis intentionally 

 introduced, it is said, as food for trout, into the river 

 Avon at Christchurch, New Zealand, was said to be 

 abundant below the Acclimatization Gardens in i88i ;'' 

 the same species, from England, thrown down in an old 

 quarry and in deep drains at Fossil Marsh near Glas- 

 gow, is known to have survived at least for some years,* 

 and SphcBritiin laciisirej Pahidina contectay B. te^itacii- 



' W. B. Marshall, " Nautikis," v. (1892), pp. 133-4, quoting Dr. 

 Lewis, "American Journ. of Conch.," iv. (1868), p. 245. 



- A. F. Gray, "American Nat.," xvii. (1883), p. 205. 



3 F. W. Hutton, " Trans, and Proc. New Zealand Inst.," xiv. 

 (1881), p. 157 ; C. T. Musson, " Proc. Lin. Soc, N. S. W." for 1890, 

 (2), V. (1891), p. 889. 



-^ W. D. Roebuck, "Scot. Nat.." 1891, p. 130. 



