Il8 JOURNAL AND PROCEEDINGS 



FAMILY RISSOID^. 



SUB-FAMILY HYDROBIN^E. 



GENUS AMNICOLA. 

 Amnicola LIMOSA. 



'A few specimens from Dundas Marsh. 

 Two species of Amnicola not yet satisfactorily identified 



SUB-FAMILY POMATIOPSIN/E. 

 GENUS POMATIOPSIS, TRYON. 

 POMATIOPSIS LAPIDARIA, Say. 



Occurs in places around the marsh and in some of the ravines 

 where damp ; is terrestrial in its habits. 



FAMILY STREPOMATID^, HALDE. 

 GENUS PLEUKOCERA, RAF, 



Pleurocera subulare, Lea. 

 Common, Hamilton Bay. 



GENUS GONIOBASIS, LEA. 



Goniobasis livescens, Menke. 

 Common, Hamilton Bay. 



ORDER CONCHIFERA. 



FAMILY CYCLADID/E, WOODWARD. 



genus sph^rium, scopoli. 



Sph^rium sulcatum, Lam. ^ 



Hamilton Bay, common, i 



SpHiERiUM rhomboideum, Say. 

 Hamilton Bay, rare. 



SPHiERIUM TRUNCATUM, Liusky. 



Hamilton Bay, rare. 



Sph^rium partumeium. Say. 



Occurs in a stream towards the Beach. Some very fine 

 specimens of this shell were taken in stagnant ponds in woods 

 at Port Dover. 



