50 INTRODUCTION. 



9. Montagu, in 1803, in his excellent work on the 

 British Testacea, added — 



1. Helix fusca. 



2. granulate. 



3. Bulimus Lackamensis. 



4. Pupa juniperi. 



5. Vertigo substriata. 



6. angustior, as T. vertigo. 



7. Clausilia biplicata. 



8. Planorbis carinatus. 



9. Limnseus truncatulus. 

 10. Conovulus bidentatus. 

 1 1 . albus. 



12. Amphipeplea glutinosa. 



13. Cyclas calyculata. 



14. Unio ovatus. 



15. Batavus. 



10. In June, 1819, Dr. Turton, in his Conchological 

 Dictionary, added — 



1. Pupa marginata. 



11. Baron Ferussac, in 1820, in his Concordance of 

 the British Land and Fresh-water Mottusca, first pub- 

 lished as British, from specimens sent by Dr. Leach 

 and Dr. Goodall, together with Testacella Maugei — 



1. Helix Carthusiana. 



2. Clausilia Rolphii. 



12. In 1821, at the end of an outline of an arrange- 

 ment of Mollusca, published in the Medical Reposi- 

 tory, I added the following, among some others which 

 had been neglected by British authors. 



