Census of Scottish Land and Fresli-Watcr Mollusca. 499 



Anodonta anatina (L). 

 Authenticated for two localities only. 



Haddington. — Gosford Ponds (W. Evans). 



Edinburgh. — Near Edinburgh (W. Turner). Locliend (W. Evans). 



Dreissena polymorpha (Pall.). 

 Local. Confined to canals near Glasgow and Edinburgh. 



Renfrew. — Paisley Canal (A. Somerville). 



Lanark. — ^Forth and Clyde Canal near Glasgow (T. Scott). 



Edinburgh. — Union Canal at Meggatland near Edinburgh (W. Evans). 



I will conclude the paper by a table showing at a glance 

 for what counties each species has been authenticated, how 

 many species have been recorded for each county, and how 

 many counties for each species ; and by asking Scottish 

 naturalists to co-operate in submitting specimens for every 

 county and species marked with a dash in the table. It is 

 desirable that particular attention be paid to sending living 

 slugs for identification, as there are no existing text-books in 

 which these are correctly described. 



[Table showing Distribution of Species. 



