EXPLANATIONS AND REFERENCES, 



PLATE CLXXXV. 



Figures magnified 250 diameters. 



PAOK. 

 Fig. 1-4. SCYTONEMA GRACILE, after specimens from rocky shores of 



Morris Pond, New Jersey, . 253 



" 5-7. SCYTONEMA TURFOSUM, medium size filaments from exposed soil, 253 

 " 8-10. SCYTONEMA CINCINNATUM, ponds, Pennsylvania and other States, 254 



