MARINE ALG2E OF THE UNITED STATES. 693 



POLYSIPHONIA FIBRILLOSA, Grev. 



Noank, Conn.; Orient Point, L. I. ; Wood's Hole, Mass.; Europe. 



POLYSIPHONIA COLLABENS, Ag. 



San Diego, Cal.?; Southern Europe. 



POLYSIPHONIA VARIEGATA, Ag. 



Cape Cod, southward ; Europe. 



POLYSIPHONIA PENNATA, Ag. 



Southern California ; Southern Europe ; Australia. 



POLYSIPHONIA PARASITICA, GrCV. 



California ; Rhode Island % ; Europe. Var. dendroidea, Ag., Cali- 

 fornia ; Chili. 



POLYSIPHONIA BAILEYI, Ag. 



Pacific coast. 

 Polysiphonia Pecten-veneris, Harv. 



Florida. 

 Polysiphonia exilis, Harv. 



Key West. 



Polysiphonia atrorubescens, Grev. 



New York to Cape Ann; west coast?; Europe; Africa; Falk- 

 land Isles. 

 Polysiphonia bipinnata, Post, and Rupr. 



West coast ; North Pacific. 

 Polysiphonia Woodii, Harv. 



West coast. 

 Polysiphonia nigrescens, Grev. 



East and west coasts; Europe. 

 Polysiphonia verticillata, Harv. 



California. 



Polysiphonia fastigiata, Grev. 



New York, northward ; California ? ; Europe. 



Odonthalia aleutica, Ag. 



Oregon ; North Pacific. 

 Odonthalia Lyallii, Harv. 



Vancouver's Island. 

 Odonthalia dentata, Lyngb. 



California ; New England ? ; Northern Europe ; Nova Scotia ; 

 Canada. 

 Rhodomela Larix, Ag. 



Oregon and California ; North Pacific. 

 Rhodomela floccosa, Ag. 



Oregon and California ; North Pacific. 

 Rhodomela subfusca, Ag. 



New York northward. Var. gracilis, same limits. Var. Rochei, 

 Long Island Sound ; North Atlantic, and Pacific 



