EXPLANATIONS AND REFERENCES, 

 PLATE CXX. 



Figures magnified 125 diameters. 



PAGE. 



Figs. 1,2. CONFERVA TENERRIM A, . . . . .143 



" 3, 4. < 'ONFERVA RHYPOPHILA, ..... 143 



Fig. 5-8. CONFERVA GL.ACIALIOIDES, . . . . .143 



Figs. 9, 10. ' 'ONFERVA FUNKII, ...... 142 



Fig. 11-13. CONFERVA AFFINIS, . . . . . .141 



" 14-16. CONFERVA UTRICULOSA, . . . . .140 



" 17-20. CONFERVA FONTINALJS, . ..... 141 



" 21-24. CONFERVA FLOCCOSA, usual condition prior to division, . 140 



Figs. 23, 25. 4 " after division, . . . .140 



" 26.27. CONFERVA, joints forming into sporangial cells . . 140 



" 29, 30. CONFERVA, filaments in a state of dissolution, . . . 140 



Fig. 31-33. CONFERVA FUGACISSIMA, ..... 141 



