116 



PROF. J. PRESTWICH ON THE RELATION OP THE 



Cypris Browiana ? 



Candona Candida, Miill. 



Gasteropoda. 



Buccinum uudatum, Linn 

 Littorina littorea, Linn. 



rudis, Maton. 



Natica catena, La Costa. 

 Purpura lapillus, Linn. 

 Scalaria groenlandica, 

 Trophon antiquus, Linn. 

 , var. contrarkcs. 



Entomostraca. 

 (Extinct) 



MOLLTISCA. 



Marine. 



Lamellihranchiata . 



Astarte borealis, Chemn. 

 Cardium edule, Linn. 

 Cyprina islandica, Linn. 

 Leda myalis, Couth. 

 My a truncata, Linn. 



arenaria, Linn. ? 



Nucula Cobboldige, Shy. ? 

 Ostrea edulis, Linn. 

 Pholas crispata, Linn. 

 Saxicaya arctica, Linn. 

 TeUina balthica, Linn. 

 obliqua, Sby. ? 



Land and Freshwater. 



Lamellihranchiata. 



Anodonta cygnea, Lin7i. 



, Tar. anatina. 



Corbicula fluminalis, Mull. 

 Pisidium amnicam *, Milll. 



(casertanum), Poli. 



'■ pusillum, Gmel. 



nitidum, Jenyns. 



roseum, Scholtz. 



Pisidium Henslowianum, Skep. 



pulchellum, Jenyns. 



Sphjerium corneum, LAnn. 



rivicola, Leach. 



ovalis, Fer. 



Unio pictorum, Linn. 



Gasterojwda. 



Ancylus lacustris, Li7in. 



Paludina gibba, Sandh.f 



Bythinia tentaculata, Linn. 



Physa fontinalis, Linn, 



Leachii, Sheps. 



Planorbis corneus, Li7in. 



Carychium minimum, Miill. 



albus, Miill. 



Clausilia, sp. ? 



crista, Linn. 



Helix arbustorum, Linn. 



carinatus, Miill. 



nemoralis, L/inn. 



complanatus, Linn. 



hispida, Linn. 



vortex, Lin7i. 



concinna, Jeffr. 



spirorbis, Lin7i. 



fulva, Mull. 



contortus, Linn. 



pulchella, Miill. 



nitidus, MUll. 



pygma-a, Drap. 



Pupa marginata, Brap. 



Hydrobia margin ata, Mich. 



Succinea putris, Linn. 



Steinii, v. Martens. 



oblonga, Drap. 



runtoniana, Sandh. 



Valvata fluviatilis, Colh. 



Limax Sowerbyi, Fer. 



piscinalis, Miill. 



modioliformis, Sandh. 



, var. a7itiqua. 



Limngea limosa (peregra), Linn. 



cristata, Miill. 



stagnalis, Linn. 



Vertigo antivertigo, Drap. 



palustris, Midi. 



Vitrina pellucida, Miill. 



truncatuia, Miill. 



Zualubrica, Mull. 



^ Pisidium asta^-toides, being generally considered a variety of P. a7n7iici(m, is 

 omitted, though Mr. C. Reid shows some reason for its being a distinct species. 



t This is Dr. Sandberger's species, determined from specimens sent by Mr. 

 Reid. 



