EXPLANATIONS AND REFERENCES, 

 PLATE LXXIX. 



Figures magnified 250 diameters. 



PAGE. 



Figs. 1-3. OEDOGONIUM CONCATENATUM, . 81 



" 4, 5. " " Var. setigeruin, 82 



" 6, 7. OEDOGONIUM BRAUNII, . . 79 



" 8, 9. OEDOGONIUM SEXANGULARE, . 82 



" 10, 11. OEDOGONIUM ACROSPORUM, Var. boreale, 84 



Fig. 12-14. OEDOGONIUM OBTRUNCATUM, . 84 



