PLATE XXn. 

 Decoration of Membranes. 



FIG. 



1. Nitellopsis ohtusa. X c 400. 



2. Lamprothamnium papulosum. X c. 500. 



3. Chara Braunii. X c 600. 



4. C. canescens. X c 450. 



5. C. vulgaris. X c. 600. 



6. C. ndis. X c. 330. 



7. C. rudis, showing the base of an oospore with the strongly- 



developed granules. X c. 240. 



8. G. Mspida. X c 450. 



9. 0. tomentosa. X c. 400. 



10. C. tomentosa, showing part of the base of the oospore with 

 the more developed granules. X c. 400. 



