1915- PhilUps. — Molhisca of South Gahvay. 149 



and sluggish streams, but sometimes occurs in the shallow margins 

 of large lakes, as at Lough Cutra and Lough Coolc. White specimens 

 were taken at Coole and Portumna. This species has hitherto been 

 recorded by British and Irish conchologists under P. spirorbis L., 

 but in a recent paper {Irish Nat., 1914, p. 131) Mr. A. W. Stelfox 

 has given reasons why the two should be separated. I have not 

 seen the true P. spirorbis in South Gal way. 



P. contortus L. — Generally distributed. In rivers, lakes, and ditches 

 at Oranmore, Athenry, Ballinasloe, Woodford, Loughrea, Kilmac- 

 duagh, Coole, Lough Cutra, Portumna, and other places. Var. 

 albida Jeffreys occurs in Lough Rea. Fossil in the Portumna marls. 



P. fontanus Lightfoot. — Rather rare. Taken in Lough Rea, Lough 

 Brick, pond at Ballyshrule, drains at Portumna and the River Suck 

 at Ballinasloe. Var. albida has been taken in Lough Rea. Fossil 

 in marl at Portumna Bridge. 



Physa fontinalis L. — Common in rivers and lakes throughout the division, 

 usually of small size. 



Aplecta hypnorum L. — Local and rather rare. Taken in pools and 

 ditches which are usually dry in summer near Loughrea, Portumna, 

 Ballinasloe, Dalystown, Dunsandle, and Lough Brick. Fossil in 

 river deposit near Ballinasloe. 



Paludestrina Jenkinsi Smith. — Local. Exceedingly abundant in the 

 river at Gort, associated with Limnaea palusiris, Planorbis vortex and 

 Acroloxus laciistris, the water here being quite fresh, and fully eight 

 miles from tidal influence, the river running for the last few miles of 

 its course underground, and mingling directly with the sea-water 

 through limestone rock at Kinvarra Bay. In Lough Coal and two 

 other small lakes near Kinvarra ; these little lakes are at a considerable 

 distance from the sea, but sea-water enters them during high spring- 

 tides through subterranean passages. Carinate and ecarinate 

 forms occur in each station. 



P. stagnalis Baster. — Very common along the seashore from Aughinisli to 

 Oranmore. 



Bithynia tentaculata L. — Common in rivers, lakes, and ditches throughout 

 the area. The white form var. albida is frequent, occurring in Lough 

 Rea, L. Derg, L. Brick, L. Atorick, and in the canal at Ballinasloe. 



Bithynia Leachi Sheppard. — The canal at Ballinasloe is the only habitat 

 known for this mollusk in South Galway. Outside the Royal and 

 Grand canals it has been recorded for Ireland only from the River 

 Barrow near Graiguenamanagh. I recently found a single specimen 

 with other drift shells in the Shannon at Limerick showing that it 

 probal^ly lives somewhere in that river or in the local canal. 



Valvata piscinalis Miill. — Generally distributed and common, occurring in 

 nearly every river and lake. Specimens from Lough Derg have 

 been identified by INlr. A. S. Kennard as var. alpestris Blauner, and 

 this appears to be the prevaiHng form. Elongat-ed and sub- 

 scalariform specimens were found at Kilmacduagh and Ballinasloe. 

 Pure white specimens occur rarely in Lough Derg and Lough Rea. . 



