PLATE LXXXIX. 



FIGS. PAGE 



1-3. Cosmarium speciosum Lund. 1, x 400 (after 



Lundell); 2, x 400; 3, x 500 . . 247 



4-5. C. speciosum var. biforme Nordst. 4, x 570 



(after Nordstedt) ; 5, x 500 . . 249 



6. C. speciosum var. simplex Nordst. x 570 (after 



Nordstedt) . . 250 



7. C. speciosum var. simplex Nordst. forma inter- 

 media Wille. x 400 (after Wille) . . 251 

 8-10. C. speciosum, var. Rosto-finskii (Ghitw.) West & 

 G-. S. West. 8, x about 520 (after Grutwinski) ; 

 9, x 625; 10, x 400 . . 251 



In the lower semi cell of fig. 8 the marks on 



the cell-wall are omitted and the small circle 



represents the position of the single pyrenoid. 



11. C. subspeciosum Nordst. x 570 (after Nordstedt) 252 



12-13. C. subspeciosum var. validius Nordst. 12, x 



570 (after Nordstedt) ; 1 3, x 520 . . 253 



14-15. C. speciosissimum Schmidle. 14, x about 550 



(after Schmidle) ; 15, x 520 . . 254 



