CATALOGUE OF PLANTS. 241 



PYLAIELLA, Bory. 



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. CHLOROPHYCE-ffi. 



CONJUGATE. 



SPIROGYRA, Link. 

 * S. majuscula, Kuetz. 

 In fresh water (Holden). 



PROTOCOCCACE^E. 



PROTOCOCCUS, Ag. 

 *P. viridis, Ag. 



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



VAUCHERIACEuE. 



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 Cranberry Isle (Collins). 



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