208 THE DISPERSAL OF SHELLS. 



it is worthy of note also that a couple of " splendidly- 

 grown Parmacella " — slugs foreign to our fauna — no 

 doubt introduced accidentally with plants, are said to 

 have been detected on one occasion in a garden near 

 Newcastle.' 



* H. B. Tristram, " Zoologist," (3), i. (1877), pp. 260-1. 



