CATALOGUE OF PLANTS. 241 



PYLAIELLA, Borj. 



P, littoralis (L.), Kjellm. Ectocarpus littoralis, Farlow's Man- 

 ual, 73. 



Common on Fucacese, etc. (Collins). 



Var. robustus, Farlow. 



Floating, near Seal Harbor (Collins). 



Subdivision III. CHLOROPHYCEiE. 



CONJUGATE. 



SPIROGYRA, Link. 



* S. majuscula, Kuetz. 



In fresh water (Holden). 



PROTOCOCCACEiE. 



PROTOCOCCUS, Ag. 



* P, viridis, Ag. 



Shaded places ; rocks, trees, fences, etc. ; common. (Holden.) 



VAUCHERIACE^. 



VAUCHERIA, DC. 



V. Thuretii, Woronin. 



Very common in lagoon, Little Cranberry Isle (Collins); — 

 shore west of Bracy Cove, with Microcoleus, etc. (Holden). 



V. litorea, Hoffm. Bang. 



Rather common at Little Cranberrj' Isle (Collins). 



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