DISPERSAL BY MAN. - 255 



recently liberated Swiss specimens in his garden at 

 Woolwich.^ 



Helix VERMICULATA Mull. This snail, a fine and 

 well-known Mediterranean species, has not (as far as I 

 know) been found living in Britain as an escape ; it has 

 been accidentally imported, however, in a living state, 

 and this is more than can be positively said for the two 

 following species, H. aperta and H. personata, both of 

 which have actually been put forward by eminent con- 

 chologists as members of our fauna. In 1891, Mr. 

 L. E. Adams sent for exhibition at the Conchological 

 Society a specimen of H. vermiculata which he had 

 received from Barnsley as a Kentish shell. In investigat- 

 ing the history of the specimen, he ascertained that it 

 arrived in Barnsley, in January, 1891, in a parcel of 

 horehound, consigned to a chemist in that town. The 

 horehound was said to have been grown in Kent, but 

 was procured in the ordinary way of business from a 

 tradesman in London who was known to deal largely 

 in foreign herbs, and as the horehound in question may 

 have been in his warehouse for several months, the 

 probability is, as Mr. Adams thinks, that the snail 

 crawled amongst it from some foreign herb which was 

 also stored there,- Mr. Adams tells me that the creature 

 was alive when it arrived in Barnsley. 



» J. G. Jeffreys, "Ann. and Mag. Nat. Hist.," (4), xix. (1877), 

 pp. 199-200; E. Collier, "Jo^rn. of Conch.," iv. (1884), p. 214; F. W. 

 Wotton, ''Journ. of Conch.," v. (1886), p. 56; H. B. Tristram, 

 "Zoologist," (3), i. (1877), pp. 260-1. 



* Proc. Conch. Soc, " Journ. of Conch.," vi. (1891), p. 393. 



