THE GREEN ALGAE OF NORTH AMERICA 459 



78. Gayella polyrhiza, multiseriate stage, after Rosenvinge. 



500 X i. 



79. Gayella polyrhiza, with rhizoids, after Rosenvinge. 



500 X i. 



80. Cylindrocapsa geminella, with oogonia, after Hansgirg. 



300 X i. 



PLATE VIII. 



81. Oedogonium fragile, with oogonia and antheridia, after 



Wittrock. 400 X i. 



82. Bulbochaete intermedia, with oogonia and dwarf males, 



after Wittrock. 300 X i. 



83. Microthamnion Kuetzingianum, after Hazen. 700 X i. 



84. Stigeoclonium lubricum, after Hazen, 400 X i. 



85. Chaetophora elegans, after Hazen. 400 X i. 



86. Chlorotylium cataractarum, branching filament, after Rab- 



enhorst. 400 X i. 



87. Pseudendoclonium submarinum, after Wille. 1000 X i. 



88. Endoclouium Moebiusianum, portion of disk, after Mobius. 



600 X i. 



PLATE IX. 



89. Draparnaldia glomerata, after Hazen. 300 X i. 



90. Pilinia Morsei, after Collins. 400 X i. 



91. Gongrosira deBaryana, after Rabenhorst. 300 X i. 



92. Ochlochaete ferox, after Huber. 300 X i. 



93. Dermatophyton radians, oo and in shell of turtle, after 



Potter. 500 X i. 



94. Epicladia Flustrae, after Reinke. 400 X i. 



PLATE X. 



95. Pringsheimia scutata, mature frond with spores, after 



Reinke. 600 X i. 



96. Chaetopeltis americana, portion of disk, after Snow. 



400 X i. 



97. Arthrochaete penetrans, after Rosenvinge. 500X1. 



98. Chaetobolus gibbus, after Rosenvinge. 300X1. 



99. Diplochaete solitaria, by L/ambert. 400 X i. 



100. Endoderma Wittrockii, after Hazen. 400 X i. 



101. Acrochaete repens, with sporangia, after Pringsheim. 



500 X i. 



