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COLLINS AND HEEVET. 



PLATE I. 



Oedogonium consociatmn 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. 550X1. 



Figure 4. Filament with oogonium (immature). 550X1. 



Chaetomorpha minima Collins & Hervey. 



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

 Figure 6. FUament of five cells. 550 X 1. 

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



Nitophyllum Willdnsoniae Collins & Hervey. 

 Figure 8. Whole plant. ^ nat. size. 



