EXPLANATIONS AND REFERENCES, 

 PLATE LXXXII. 



Figures magnified 250 diameters 



PAGE. 



Fig. 1-3. OEDOGONIUM MACRANDEIUM, . 80 



" 4-6. OEDOGONIUM PRINGSHEIMII, 90 



" 7-9. OEDOGONIUM FRANKLINIANUM, . . 89 



" 10. OEDOGONIUM URBICUM, 74 



' 11-13. OEDOGONIUM Boscn, . 91 



Figs. 14, 15. OEDOGONIUM CARBONICUM, . ( JO 



