PLATK XXIX. 



Figures magnified 500 diameters. 



I 1 AC.K 

 Fig. 1-3. EUASTRUM VENTBICOSUM, zygospore, lateral and end views of 



cell, . . . .110 



Figs. 4, 5. EUASTRUM CRASSUM, Var. SCROBICULATUM, front and lateral 



views, . . . . 106, 108 



" 6-8. EUASTRUM MACJNIFICUM, front, lateral and end views, . 108 



" 9-11. EUASTRUM PURUM, two front and one lateral view, . 110 



" 12, 13. EUASTRUM CUNEATUM, front and lateral views, . . 108 



