PLATE XXV. 



Lamprothamnium -papulosum J. Groves. 



Fia. 



1. Plant, natural size, from Newtown, I. of Wight. 



2. Base of whorl showing stipulodes. X c 20. 



3. Apex of branchlet. X c. 20. 



4. Upper part of branchlet with two fertile nodes. X c. 20. 



5. Branchlet-node. X c. 25. 



6. Oogonium. X c. 40. 



7. Coronula. X c. 40. 



8. Oospore. X c 40. 



9. Oogonium which has secreted lime-shell. X c. 40. 



