PLATE VII. 

 Figs. 1-3. — Schizotncha unifurcata. 



Fisr. 1. — Natural size. 



Fig. 2. — Portion of a hydrocladium, magnified ; showing its single bifurcation and the 

 gonangia carried by the ramuli. 



Fig. 3. — Variety of same species with short hydrocladia; natural size. 



Figs. 4, 5. — Schizotncha multifurcata. 



Fig. 4. — -Natural size. 



Fig. 5. — Portion of a hydrocladium, magnified ; showing three bifurcations and the 

 gonangia borne by the ramuli. 



