DISPERSAL BY MAN. 261 



finally excluded it from our lists in his " Turton " of 1840, 

 observing that it was not even naturalized or acclima- 

 tized, for it occurred only in hot-houses warmed with 

 artificial heat. ^ 



Mr. W. Borrer tells me that many years ago the late 

 Sir W. Hooker gave him specimens of this mollusc 

 (together with B. goodallii) from the Royal Gardens at 

 Kew. 



BULIAIUS OCTONUS Chemn., a West Indian and 

 Central American species, is said to occur in green- 

 houses in this country. It has been recorded from near 

 Manchester, etc." 



Clausilia PAPILLARIS MiilL, of southern Europe, 

 seems to have found a place among our native shells 

 at one time. As stated by Mr. Alder, however, a 

 manuscript copy of Laskey's " North British Testacea," 

 consulted by Forbes, was found to " fully explain the 

 history of the British C. papillaris!' The creature 

 occurred, it appears, in Granton Park, near Edinburgh, 

 to which place it had been imported from abroad in 

 moss round the roots of some exotics.^ 



Clausilia solida Drap. Of this species, also a 

 native of southern Europe, a single specimen (figured 

 in the supplement to the " British Conchology ") is said 

 to have been found at Stapleton, near Bristol, by Mr. 



' Turton, "Zoological Journal," ii. (1826), p. 565; "Manual," 

 1831, p. 79 ; Alder, " Mag. Zool. Bot.," ii. (1838), p. no; Gray's 

 "Turton," 1840, p. 184. 



* T. D. A. Cockerell, " Science Gossip," 1893, p. 26. 



3 J. Alder, '*Mag. Zool. Bot.,^' ii. (1838), in. 



