PLATE XL 



Nitella translucens Agardh. 



FIG. 



1. Plant, two-thirds natural size, from Lough ton, S. Essex. 



2. Apex of sterile branchlet. x c. 20. 



3. Portion of fruiting head. x c. 15. 



4. Oogonium. x c. 20. 



5. Oospore. x c. 40. 



