6 R Gronblad, New Desmids. 



also collected about 40 samples by an expedition in NW- 

 Russia, Governement of Archangel, aroud Uhtua and Hirvi- 

 salmi. 



In conclusion, I want to express my hearty thanks to 

 Dr O. Borge, my honoured friend in Sweden, who gave 

 me kind advice and assisted me on many difficult points. 

 Furthermore I am deeply indebted to him tor the two 

 weeks spent at his home in Stockholm, where his very 

 complete library and rich collection of Desmid-figures were 

 placed at my disposal. 



Helsingfors, September 1921. 



