Plate XXXVI; Figures 229 to 23"; Magnified iooo 



Diameters. 



Fig-. 229. Euastrum oblongatum (Grev.) Ralfs page 62 

 Fig. 230. " ampullaceum Ralfs . " " 



Fig. 231. Staurastrum crenulatum (Delp.) 



Nag. End view .... " " 



Fig. 231a. Staurastrum crenulatum (Delp.) 



Side view ..... 

 Fig. 2^2. Euastrum elegans. Kiitz. . 

 Fig. 2^. Staurastrum dejectum Breb. . 

 Fig. 233a. " " End view 



Fig. 234. Euastrum Nordstedtianum Wolle . 

 Fig. 235. Staurastrum margaritaceum Ehrb. . 

 Fig. 235a. 



Side view ..... 

 Fig. 2$(). Staurastrum dejectum Breb. . 

 Fig. 23<hi. " Side view 



Fig. 2$~. gracile Ralfs 



Fig. 23-a. Side view 





