TABLE {continued). 



147 





Genera and Species. 



British Distribution. 



General Distribution, 



% 



lineatus, Bean. 







lacustris, Leach. 







H 



acutus, JefF. 







6 



auricularius, Linn. 



ir.-viii. 



All Europe, Cachemyr. 



7 



involutus, Harvey. 



VIL 



? 



8 



glutinosus, Mull. 



IL, IV. 



Central Europe. 



XVI. 



Ancylus, Geoffrey. 







1 



fluviatilis, Mull. 



L— IX. 



All Europe, N. Africa. 



2 



lacustris, Mull. 



II,— VIII. 



All Europe, 



Note. — The preceding table is based on Mr, Alder's Catalogue, in the Second Volume 

 of the Magazine of Zoology and Botany, The list has been submitted to him, 

 and I am happy to say the alterations have received his sanction. 



l2 



