INTRODUCTION. 15 



Mr. Forbes furnished Mr. Alder with the fol- 

 lowing account of the introduction of this species 

 into the Fauna. He says, " I have lately ob- 

 tained a manuscript copy of Laskey's North 

 British Testacea, written by himself, which fully 

 explains the history of the British Clausilia papil- 

 laris. He states, that it was found by him in 

 Granton Park, near Edinburgh, and that it was 

 imported from abroad, in moss round the roots of 

 some exotics." 



Nilson gives this as a Swedish species, but pro- 

 bably his shell is our Clausilia biplicata, for that and 

 many other species have whitish spots near the suture. 



21. Clausilia ventricosa Drap. t. 3. f. 14., Rossm. 



Icon. t. 7. f. 102. 



Clausilia biplicata has been mistaken for 

 this species. Rossmasler thought that Tur- 

 ton's figure 57. represented it. 



4 



22. Achatina folliculus Lam. vi. ; Michaud, Compl. 



53. t. 15. f. 14, 15. 

 Helix folliculus Gmel. 3654. 

 Helix gracilis Lowe Mol. Mad. 61. t. 6. f. 28. (?) 

 Young H. cochlitoma folliculus Ferussac, Bull. 



Zool. i. 7. 



Physa scaturiginum Drap. 56. t. 3. f. 14, 15. 



Lymneus scaturiginum Turton, Man. ed. 1. f. 104. 



Inhab. south of France, Sicily, under stones, &c. 



Dr. Turton, according to the remarks of Dr. 



Fleming (B. A. 274.), Mr. Jeffreys, and Mr. Alder, 



mistook the young of Lymneus glaber, according 



to the first, and L. stagnalis^ according to the two 



