EXPLANATIONS AND REFERENCES, 

 PLATE CXXI. 



Figures magnified 125 diameters. 



PAGE. 

 Fig. 1-3. CONFERVA AMGENA, normal vegetative condition, . .140 



u 4. Older filament in state of dissolution ; cells separating, micro- 



gonidia being scattered, . . . . .140 



" 5. Microgonidia under high power, . . . .140 



Figs. 6, 7. CONFERVA VULGARIS, the type-form, . . . .142 



" 8, 9. CONFERVA BOMBYCLNA, . . . . .142 



" 10, 11. CONFERVA VULGARIS, Var. Farloiuii, . . .142 



Fig. 12. microgonidia escaping, . . 142 



" 13. " " young forms, . . .142 



" 1417. stages of decay Hormospora forms, . 142 



Figs. 18, 19. CONFERVA ABBREVIATA, ...... 143 



" 20, 21. CONFERVA PUNCTALIS, . . . . . .142 







Fig. 22-25. EHIZOCLONIDM FONTINALE. . . . . .144 



" 26-28. KHIZOCLONIUM FLUITANS, . . . . .145 



Figs. 29, 30. RHIZOCLONIUM HIEROGLYPHICUM, .... 144 

 " 31, 32. " " Var. Americana, , 144 



