156 



LAND AND FRESHWATER SHELLS. 



V. LAND AND FRESHWATER SHELLS. 



AQUATIC. 



GASTROPODA. 



Paliidinulce, 



Bythiuia tentaculata 



,, Leachii 

 Hydrobia ventrosa 



CONCHIFERA. 



Sphtrriidce. 



Sphrerium corneuin 



,, lacustre 

 Pisidium amnicum 



,, nitidum 

 Unionida. 

 Unio tumidus 



, , pictormn 

 Anodonta cygnea 



,, var. radiata 



,, ,, incrassata 



NOTE. The shells of the 

 above Unionidae are found 

 in the Hythe Canal. ButPhysa fontinalis 

 this is now pcriodicallyLimnnea peregra 

 flushed with sea water, so " ,, var. labiosa 

 that the molluscs have died , , auricularia 

 out. I have some remark- ,, stagnalis 

 ably fine specimens of palustris 



Anodonta (seven inches ,, var. elongata 

 straight through), some of ,, trimcatula 

 which have shells of the ,, var. albida 

 Acorn Barnacle attached. Anoylus fluviatilis 

 H.U. 



Planorbis nitidus 



nautileus 



albus 



spirorbis 



vortex 



complanatus 



corneus 



contortus 



