200 WISCONSIN PHYTOPLANKTON 



PLATE 78. 

 All figures x 500. 



Page 



Figs. 1-7. Staurastrum leptocladum Nordst 102 



Figs. 8-11. Staurastrum leptocladum var. insigne W. & G. S. West 103 



Figs. 12-14. Staurastrum leptocladum var. sinuatum WoUe 104 



Fig. 15. Staurastrum leptocladum var. sinuatum forma planum 104 



