172 



COLLINS AND HERVEY. 



PLATE I. 



Oedogonium consociatum Collins & Hervey. 



FIGURE 1. Large cluster of young filaments. 255 X 1. 



FIGURE 2. Smaller cluster of same. 255 X 1. 



FIGURE 3. Single filament with attached basal cell. 550 X 1. 



FIGURE 4. Filament with oogonium (immature). 550 X 1. 



Chaetomorpha minima Collins & Hervey. 



FIGURE 5. Filament of two cells. 800 X 1. 

 FIGURE 6. Filament of five cells. 550 X 1. 

 FIGURE 7. Filament of five emptied cells. 550 X 1. 



Nitophyllum Wilkinsoniae Collins & Hervey. 

 FIGURE 8. Whole plant, f nat. size. 



