INTRODUCTION. 19 



Inhab. West Indies, St Vincent's. Rev. L. 

 Guilding. 



Introduced by Montagu (T. B. 384.) on the 

 authority of Mr. Byers, who stated he found it at 

 Weymouth and at Dorchester ! Mr. Alder observes, 

 that since Dr. Turton has withdrawn his statement 

 of having found this shell in Ireland, Mr. Byers 

 remains our only authority for considering it as 

 British ; but, whatever the original shell found by 

 Mr. Byers may have been, the specimens now in 

 English cabinets appear all to belong to the genus 

 Bulimus, and are most likely foreign. Capt. Blo- 

 mer sent me, continues Mr. Alder, a foreign Palu- 

 dina for this shell, a few years ago. The Bulimus 

 radiatus of France, and B. exilis of the West 

 Indies, are the species which generally occupy its 

 place in the British cabinets. 



3. BULIMUS fragilis Lam. Hist. vi. ed. 2. 231. 



Inhab. 



Introduced by Lamarck, who received it from 

 Dr. Leach as the Helix fragilis of Montagu ; but 

 this must be a mistake, as Montagu's shell is cer- 

 tainly, as his description and figure show, the young 

 state of Lymneus stagnalis. The above-described 

 may be only a bleached specimen of the next. 



4. BULIMUS fiiscus. 



Bulimulus fuscus Guilding, Zool. Journ.iv. 176. 

 Helix fragilis Montagu, Cabinet (in Brit. Mus.) not 



in T. B. 

 Helix lymnoides Ferussac (?) 57. 393. 



Inhab. West Indies, St. Vincent's. Rev. L. 

 Guilding. 



