PLATE CXLVI. 



FIGS. PAGE 



1. Staurastrum paradoxum var. nodulosum West. X 



400 . . . . . 106 

 2-3. St. paradoxum var. longipes Nordst. 2, X 520 ; 3, 



forma major, X 520 . , .103 



4:. St. dubium West. X 400 . .112 



5. St. boreale W. & G. S. W. X 520 . 112 



6. St. pdagicum W. & G. S. W. X 520 . 124 



7. St. anatinum Cooke & Wills, x 520 . .142 



8*. St. anatinum var. (runcaium West, x 510 145 



