Ms 



LAND AND FRESH PVATER. 



Jlquafic. 



Class I.— CONCHIFERA. 



Order LAMELLIBRAOHIATA, 



Family I.-SPH/CrTiD/E. 



Genus I.— Sphaerium, Scop. 



SPHiERIUM CORNEUM, Z. 



Sphaerium corneum, v minor, Gray. 



Sphaerium corneum, v flavescens, Macgill. 



Sphaerium corneum, v nucleus, Stud. 



Sphaerium corneum, v compressa, Gray 



Sphaerium corneum, v Scaldiana, Norm. 



Sphaerium corneum, v Pisidioides, Gray. 

 Sph^rium rivicola, Leach. 

 Sph^rium ovale, Fer. 

 Sph/erium lacustre, Milll. 



Sphaerium lacustre, v Brochoniana, Bourg. 



Sphaerium lacustre, v rotunda, Jeff. 



Sphaerium lacustre, v Ryckholtii, Norm. 

 Genus II.— Pisidiunn, C. Pfeiffer. 

 PlSIDIUM AMNICUM, Midi. 

 PiSIDlUM FONTINALE, Drap. 



Pisidium fontinale, v Henslowana, Shepp. 



Pisidium fontinale, v pulchella, Jenyns. 



Pisidium fontinale, v pallida, Gassies. 



Pisidium fontinale, v cinerea, Alder, 

 Pisidium pusillum, Gmelin. 



Pisidium pusillum, v ol^tusales. Lam. 

 Pisidium nitidum, Jeny?is. 



Pisidium nitidum, v splendens, Moq, 

 Pisidium roseum, Scholtz. 



