PLATE VI. 



Nitella capillaris comb. nov. 



FIG. 



1. Male plant, natural size. 



2. Female plant, natural size. 



Both from Sutton, Isle of Ely. 

 3-5. Apices of dactyls, x c. 40. 



6. Branchlet-node, with antheridium surrounded by mucus. 



x c. 15. 



7. Branchlet-node with group of oogonia surrounded by 



mucus, x c. 20. 



8. Oospore. x c. 45. 



