FRESH WATER ALG-€. 



PUTE VI. 



T. SIHCCAIR * MM. PM1I.A011.PMIA. 



AFTER NATURE BY OR H.C.WOOD. 



Fig 1. SCYTONEMA THEBMALE. 

 " 2 S. CALLITRICHOIDES. 

 " 3. S. OUBIUM. 



Fig. 4. S CORTEX. 

 " 6. CH/tTOPHORA ELEGANS, 



