EXPLANATIONS AND REFERENCES, 



PLATE CXLIV. 



Figures magnified 300 diameters. 



JfAGE. 



Figs. 1, 2. ZYGNEMA CRUCIATUM, ...... 224 



Fig. 3-7. ZYGNEMA PURPUREUM, . . . . 224 



8. ZYGNEMA, spores germinating in cells, . . . 224 



" 9. ZYGNEMA ANOMALUM, ..... 224 



" 10-12. " " Var. crassum, .... 224 



" 13. " " " " fertile, 225 



