INTRODUCTION. 17 



Inhab. Minorca, Algiers. 



Introduced by Dr. Turton, who figures it for 

 the next species. He says he found a single speci- 

 men near the sea-coast in the West of Ireland ! 



27. CYCLOSTOMA sulcatum Drap. 33. t. 13. f. 1. (not 



Lam. n. 4.) ; Rossm. Icon. t. 28. f. 304. 



Inhab. Provence, South Italy, and Sicily. 



Introduced with doubt by Dr. Turton (Man. 

 ed. 1. 94.), who believed that it was the foregoing 

 species. Deshayes refers to Turton (Man. fig. 

 76.) for this species. 



28. VALVATA minuta Drap. 12. t. 1. f. 36, 37, 38. 



Inhab. France. 



Mr. Miller (Annals of Phil. iii. 377.) introduced 

 this species as found near Bristol, from two dead 

 shells ! 



29. VALVATA spinorbis Drap. 41. t. 1. f. 32, 33. 



Inhab. France. 



Turton introduced this species in the Manual. 

 See Mr. Alder's remark on it at Valvata cristata. 



30. CYCLAS lacustris Drap. 130. 1. 10. f. 6.7., Turton, 



Man. ed. 1. 14. t. 1. f. 4. 



Inhab. France. 



Mr. Miller and Dr. Turton give this as a Bri- 

 tish species ; the latter copies Draparnaud's descrip- 

 tion and figure. Mr. Alder informs me that the 

 specimens which Dr. Turton described are only a 

 variety of Cyclas calyculata. Mr. Alder observes, 

 that the Cyclas lacustris of Draparnaud is cer- 

 tainly unknown to British naturalists ; but as the 

 species is described by most of the continental 

 authors, we might conclude that they were well 



