EXPLANATIONS AND REFERENCES, 

 PLATE CC. 



PAGE. 

 Figs. 1 . 2. CHAMAESIPHON CONFERVICOLA, .... 295 



Flu;. 3. CHAMAESIPHON INCRUSTANS, young forms often densely placed, 



incrusting the plants upon which 

 it is parasitic, . . 295 



Figs. 4, 5. LYNGBYA CINCINNATA, from specimens from Mt. Mansfield, 



Vermont, .... 296 

 Fig. 6-8. LYNGBYA WOLLEI, short sections of filaments, often very 



abundant, .... 297 



Figs. 9, 10. LYNGBYA MAJUSCULA, from brackish water, New York, . 297 



Fig. 1 1-16. XYNGBYA AESTUARH, specimens collected in numerous localities 



along the coast of New Jersey, and in 

 Florida, 296 



