FRtSH WATER ALG* 



PLATE XVIII. 



'! -.T U ., ., . c VOOD 



Fi( 1. PRINGSHEIMII INAEQUALC. 



" 1 OEDOGONIUM MIRABILE. 



* . OEOOGONIUM ECHINATUM 



* OCDOOONIUM. 



Fig. & BULBOCM/CTE IGMOTA. 

 - BULBOCH/CTS DUMOSA 

 " 7 CONFERVA. 



