DISPERSAL BY MAN. 23 1 



W. Borrer tells me that he received specimens many 

 years ago from the Royal Gardens at Kew. I hear 

 from Mr. G. F. Wilson that a colony — first noticed, he 

 thinks, nearly thirty years ago — used to exist in a 

 cucumber-house in a garden at Wandsworth, from 

 whence specimens were submitted to the Scientific 

 Committee of the Royal Horticultural Society and 

 identified by Mr. Berkeley ; possibly the creature was 

 introduced with pines, for there was formerly a pine- 

 house in the garden. Weybridge has more than once 

 been quoted as a locality for this snail, which has been 

 erroneously stated — in the "Garden" newspaper for 

 instance — to have occurred in Mr. Wilson's garden 

 there ; the mistake arose, no doubt, from the fact that 

 while living at Wandsworth, Mr. Wilson had a garden 

 at Weybridge, well known in the horticultural world. 

 The snail seems to have occurred, in 1876, in large 

 numbers, in a cucumber-house at Gunnersbury. In 

 1 88 1, Mr. Ashford stated that it had flourished for many 

 years in the orchid-houses of Mr. Day of Tottenham, 

 from which locality he had procured living specimens 

 in 1867. Mr. F. W. Wotton mentions having received 

 it, in 1886, from Mr. Chapman's greenhouse, presum- 

 ably at or near Cardiff; and in one of the hot-houses in 

 a garden at Croydon it was recently found in such vast 

 numbers that all the soil in the house had to be collected 

 and burned. Possibly the animal is now very generally 

 distributed, in greenhouses, etc., throughout a great part 

 of the country.^ 



1 Turton, " Zoological Journal," ii. (1826), p. 565 ; J. S. Miller, 



