yS 7/iC Irish Naluyalisl. May, 



The following are new comital records : — 



Antrim. — Pisidium Lilljehorgii. E. Donegal. — Amphipcplea glutinosa, 



Planorbis vortex, P. albus, Anodonta 

 cygnea, Pisidium amnicmn, P. 

 personatum and P. Lilljehorgii. 



NOTES ON THE SPECIES. 



Limnaea stagnalis (Linn.) — All these examples are decidedly small. 

 Those from Meenameen Lough are much more slender and higher spired 

 than those from L. Namnamurrive, which latter are identical with those 

 previously obtained from Lower L. Erne. 



Limnaea pereger (Miill.) — As a rule the examples are small and fragile. 

 The largest are from Meenameen Lough, i8 x 4*2 mm., with a large but 

 not inflated body-whorl. The shells from Castlecaldwell arc quite distinct. 

 They are small with rather a high spire and slightly reflexed at the base 

 of the last whorl. It is probably a question of environment. 



Limnaea palustris (Miill.) — All the examples from the lakes are small 

 and slightly eroded. This form seems fairly constant. The shells from 

 Castlecaldwell are quite different. They are very slender and elongated ; 

 those from the railway are 18x7 mm., and mouth aperture 7 mm. high. 

 One from the bog holes measures 21 x 7*6 mm., mouth aperture 8 mm. 

 high. We have seen no examples either from Great Britain or Ireland 

 that are so extreme as these. It is the L. tiirricitla. Held, of German 

 authors. 



Limnaea praetenuis, Bow. — We can now add five additional localities 

 for this species — Loughs Golagh, Scalban, Cclumbkille, Aghvag, and 

 Awaddy. We still consider that this is a good species and quite distinct 

 from pereger. It is sometimes difficult to distinguish with young indivi- 

 duals, but there is no difficulty with adults, 



Amphipeplea glutinosa (Miill.) — This is a welcome addition to the 

 fauna of East Donegal. 



Anodonta cygnea (Linn.) — One living example only was taken from 

 Keenaghan Lough. It is the form known on the Continent as A. cel- 

 lensis Schrot. Since this lake is in Fermanagh and East Donegal it is 

 of course possible that the species should be credited to the former county, 

 but in dealing with these artificial boundaries it is of no consequence to 

 which county it is allocated. 



Sphaerium corneum (Linn.) — Numerous examples of the inflated form 

 noted in our previous report were collected. Examples from Lake 

 Namnamurrive measured 7 • 5 x 6 • 4 x 5 ; from L. Sculban 7x6x5 ; 

 from Tully Lough 11x9x8. It is probably a question of environment. 

 Pisidium. — Through the kindness of Mr. Welch, Major Trevelyan was 

 better equipped in 191 1 for taking the small bivalves, and the results 

 show in the lists, most of the loughs yielding two or more species. 



Two corrections have to be made in our previous communication. The 

 specimens noted as Pisidium Steenhuchii from Lough Tullynasiddagh 



