230 THE DISPERSAL OF SHELLS. 



and is believed to have been introduced into England 

 with pine-plants. It has been found in several widely 

 separated places in this country, but can hardly be 

 said to be acclimatized, for I believe it lives chiefly or 

 exclusively in greenhouses, stoves, pits, etc. ; Dr. Turton, 

 however, in 1826, considered it "to be naturalized as 

 much as the Testaccllns niaugci!^ Like that species it 

 was first detected in Miller and Sweet's nursery, near 

 Bristol, at about the same time or a little later, i.e. 

 during the years 18 16-17. The species was originally 

 described from the British specimens, as Hdix goodaliii, 

 in a list of shells occurring in the environs of Bristol 

 published by Mr. Miller in 1822. The author men- 

 tioned that he found the creature, in 18 17, on boards 

 lining a pine-bed. Mr. Drummond, in a letter to Dr. 

 Fleming, however, stated that the animal was first 

 pointed out by him in i8i6_, and it appears to have 

 occurred in some plenty, for, when a supply was required, 

 he merely placed a flat board upon the surface of the 

 tan, with a few dead worms beneath it, and this,, in a 

 few days, became "covered " with shells. Mr. Jefl'reys 

 (1862) stated that the creature was still very common 

 on the tan in the pineries in which it was discovered ; 

 he certainly erred, however, in saying that it had not 

 been noticed elsewhere in this country, for Mr. Alder 

 (1838) had mentioned having seen specimens from a 

 garden in the neighbourhood of Manchester, and in 

 Gray's "Turton" of 1840 the animal was said to be 

 common in some places in the neighbourhood of 

 London, especially in Kensington Palace Garden. Mr. 



