12 INTRODUCTION. 



12. Helix plebeia Drap. 



A native of France, Switzerland, and Germany. 



Mr. Jeffreys introduced this shell as being some- 

 times found with H. concinna, and probably another 

 variety of H. hispida. 



13. Bulimus detritus Deshayes. 



Bulimus radiatus Brag. E. M. 312., Drap. 73. 



t. 4. f. 21., Rossm. Icon. t. 2. f. 42. 

 Helix detrita Mutter, ii. 101. 

 H. sepium Gmel. 



Bui. sepium Hartmann, Lister, C. t. 8. f. 2. 

 Helix radiata Ferus. 

 Buccinum leucozonias Gmel. 

 Inhab. France and Germany. 

 This species was introduced into our 

 Fauna by Baron Ferussac, who considered 

 that the Helix detrita of English authors 

 must have been described from a specimen 

 of this species, their Helix detrita being a 

 tropical shell, — our Bulimus exilis, p. 17. 



14. Bulimus ventricosus Drap. 78. t. 4. f. 31, 32., 



Rossm. Icon. t. 28. f. 377. 

 Helix cochlicella ventrosa Ferus. Prod. 52. 377. 



A native of the south of France, Italy, Syria, 

 and Spain. 



Introduced by Dr. Turton {Man. ed. 1. 86.), 

 who believed that a variety of Bulimus acutus, which 

 he had received from Cornwall, was referrible to this 

 species. Mr. Jeffreys thought it was a variety of H 

 acutus (Linn. Trans, xiii. 347. 513.), and Rossmasler 

 has referred to Turton's figure without a doubt, as 

 belonging to that species. 



