68 



Aneylus oblongus, Lightfoot. In the old fishpond of the Great 

 House at Churchdown. 



CYCLOSTOMIDa;. 



Cyclostoma elegans, Miiller. Amongst moss, under the hedgerows, 

 at Birdlip, and on the hill-tops in that neighbourhood. 



AURICULIDiE. 



Carychium minimum, Miiller. Moss on canal banks. Decaying leaves 

 in woods. Common. 



BIVALVES. 



CyCLADIDiE. 



Cyclas rivicola. Leach. Newent and Berkeley canals. Combe hill 



canal. Severn, Wainload. 

 C. cornea, Lin, Canals. Brooks, ditches, and ponds everywhere. 

 C. caliculata, Drap. Small pond in Barkworth and Spaldin's yard 



Bristol road, near Gloucester. Millpond of Fisher's mill, Barton 



St. Mary, 

 Pisidium obtusale, Pfeiffer. "What I believe to be this species, I took, 



in immense numbers, from a small shallow pond on the hill above 



Mitcheldean, in the direction of the "Wilderness, of which it 



appeared to be the only molluscous inhabitant. 

 P. pusillum, Turton. Common, Canals, ponds, and streams. 

 P. pulchellum, Jenyns. Streams and canals. Clear ponds. Common. 

 P. amnicum, Miiller. Common everywhere, with Cyclus cornea. 



UnionidjE. 

 Unio tumidus, Retzius. Severn, at Wainload, and all the canals. 



Common. 

 U. pictorum, Lin. Newent canal. Over. Berkeley canal, near 



Stonebench. Rare. 

 U. margaritiferus, Lin. Near Ross, in the "Wye. 

 Anodonta cygnea, Lin. Common in the Severn and many smaller 



streams, and in all the canals of the district. 



Mytilid^. 



Dreissena polymorpha, Pallas. Introduced by the opening of the 

 Berkeley canal, in which, and in the other canals connected with 

 it, and in the Severn, it is exceedingly abundant. 



