EXPLANATIONS AND REFERENCES, 

 PLATE LXVIII. 



PAGE. 

 Figs. 1, '2. CHANTRANSIA VKXLACEA, natural size, . . . .59 



Fig. 3. three filaments magnified about 125 



diameters . . . .59 



Figs. 4, 5. Clusters of carpogons or sporangia emitting gonidia. . 59 



Fig. 6. Five single gonidia settled in a scratch on glass of aquarium and 



multiplied by cell division, .... 59 



7. A cluster of gonidia under higher power, developing young plants, 59 



8. A group of young plants, ... .59 

 Figs. 9, 10. Specimens of Var C. expansa, . . 59 



" 11, 12. Clusters of earpogons, 60 



Fig. 13. Natural size of plants, . . 60 



14. Var. C. Beardslei, magnified 125 diameters, . 60 



