Plate 42 



Figs. 1-3. Ocdogoniwn oelandicum var. contortum Prescott, x 

 450 



Figs. 4-6. Oedogonium Kozminskii Prescott: 4, x 750; 5, x 375 



Figs. 7-9. Oedogonium polyandrium Prescott: 7 and 8, x 625; 9, 

 x700 



Fig. 10. Oedogonium hians Nordstedt & Hirn, x 500 



Figs. 11, 12. Oedogonium decipiens var. dissimile (Hirn) TifiFany, 

 x625 



Figs. 13, 14, Oedogonium decipiens Wittiock: 13, x 700; 14, x 350 



1744] 



