176 



2691. P. hyalina, Bn'b. 



Abundant in ditches in April and May. 



894. PLEUROCOCCUS. Menegh. 



5592. P. roseo-persicinus, Rabenh. 



Especially abundant on the submerged parts of water-plantain, 

 ( . \lisma Plantago.) 



2593. P. miniatus, Naeg. 



2594. P. vulgaris, Menegh. 



B95. CYLINDROCAPSA, Reinsch. 



2595. C. geminata, Wolle. 



Wolle. 



Sl:b-Ordek 3. PHYCOCHROMOPHYCE.E. 



S9&. SCHIZOSIPHON, Kuetz. 



259(5. S. intertentus, Grun. 



Determined by Wolle. 



2597. S. crustiformis, Naeg. 



Determined by Wolle. 



259^. S. Cataractae, Naeg. 



Niagara Falls, Wolle. 



897. SYMPHYOSIPHON, Kuetz. 



2599. S. incrustans, Kuetz. 



On rocks exposed to the spray of Niagara Falls. Wolle. 



2600. S. Contarenii, Kuetz. 



In same situations with the last. // 



S9S. ARTHROSIPHON Kuetz. 



2601. A. alatus, Rabenh. {Petalonema alatum, Berk ) 



" On dripping rocks under Biddle stair-case, Niagara Falls." 

 Harvey. 



S99. DIPLOCOLON, Naeg. 



2602. D. Heppii, Naeg. 



Niagara Falls, Wolle. 



900. SCYTONEMA, Agardli 



2603. S. chrysochlorum, Kuetz. 



Shaded rocks, Niagara Falls. Ilo/A: 



