240 



5591. P. hyalina, Br6b. 



Abundant in ditches in April and May. 



894. PLEUROCOCCUS, Menegh. 



5592. P. roseo-persicinus, Rabenh. 



Especially abundant on the submerged parts of water-plantain, 

 [A lisma Plantago.) 



2593. P. miniatus, Naeg. 



2594. P. vulgaris, Menegh. 



895. CYLINDROCAPSA, Reinsch. 



2595. C. geminata, Wolle. 



Wolle. 



Sub-Order 3. PHYCOCHROMOPHYCEiE. 

 896. SCHIZOSIPHON, Kuetz. 



2596. S. intertentus, Grun. 



Determined by Wolle. 



2597. S. crustiformis, Naeg. 



Determined by Wolle. 



2598. 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. Wolle. 



898. ARTHROSIPHON. Kuetz. 



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



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

 Harvey. 



S99. DIPLOCOLON, Naeg. 



2602. D. Heppii, Naeg. . 



Niagara Falls, Wolle. 



900. SCYTONEMA, Agardh 



2603. S. chrysochlorum, Kuetz. 



Shaded rocks, Niagara Falls, Wolle. 



