EXPLANATIONS AND REFERENCES, 



PLATE CXCV. 



Figures magnified 250 diameters. 



PAGE. 



Fig. 1-4. SCYTONEMA HEPPII, ...... 200 



" 5. " a broken-off' filament, . . 260 



Figs. 6, 7. " the macrospores escaping and developing; 



reproducing young plants, . . 2^0 



" S, 9. " " young conditions, . . . .260 



Fig. 10. HAPALOSIPHON BYSSOIDEUS, in early stage, . . 276 



Figs. 11, 12. more advanced, . . . 27*5 



13,14. HAPALOSIPHON TORULOSUS part of a faded filament, . 276 



Fig. 15. SIROSIPHON PULVINATUS, from West Virginia, very tuberlose, 



near Agardh's S. mamillosum, . 270 

 '* 16' specimen from dripping rocks West 



Virginia, . . 270 



