EXPLANATIONS AND REFERENCES, 

 PLATE LXXV. 



Figures magnified 250 diameters. 



PAGE. 



Fig. 1. OEDOGONIUM PALUDOSUM, . . . . .74 



' 2. OEDOGONIUM GBACILLIMUM, .... 74 



" 3. OEDOGONIUM LONGATUM, . . . . .95 



" 4-6. OEDOGONIUM FONTICOLA, ..... 93 



Fi.^s. 7, 8. OEDOGONIUM LONDINENSE, . . 94 



" 9, 10. OEDOGONIUM PACHYANDRIUM, .... 89 



Fig. 11-13. OEDOGONIUM CAPILLIFORME, . . . . .88 



