204 BEITISH DESMIDIACE^l. 



Lougli Athry, and lakes between Clifden and Round- 

 stone, Galway ! Adrigole, Kerry ! Dublin and Wicklow 

 (Archer). 



Geogr. Distribution. Germany. Galicia in Austria, 

 Poland (var.). Norway. Sweden. Ceylon. New 

 Zealand (var.). Australia (var.). "W. Africa. United 

 States. Brazil. 



This characteristic little species is easily distinguished from 

 C. pseudopyramidatum by its smaller size and its densely- 

 scrobiculate cell-wall. It is a much rarer .Desmid than either 

 of the two preceding species. 



