MARINE ALG.E OF THE UNITED STATES. 713 



Ulva lactuca, Linn. 



With the last, but not so common. 



Ulva fasciata, Delile. 

 California. 



Cladophora repens, Ag. 



Key West ; Europe. 

 Cladophora membranacea, Ag. 



Key West; Mediterranean. 



Cladophora rupestris, L. 



New York, northward ; Europe. 



Cladophora cartilaginea, Rupr. 



California. 

 Cladophora arcta, Dillw. 



New York, northward ; Europe. 



Cladophora lanosa, Roth. 

 Boston ? ; Europe. 



Cladophora uncialis, Fl. Dan. 

 New England coast ; Europe. 



Cladophora glaucescens, Griff. 



Charleston, S. C, northward ; Europe. 



Cladophora flexuosa, Griff. 



New England coast; Europe. 



Cladophora refracta, Roth. 



Charleston, S. C, northward ; Europe. 



Cladophora Morrisijs, Harv. 

 Elsinborough, Del. 



Cladophora albida, Huds. 



New York and New Jersey ; Europe. 



Cladophora Rudolphiana, Ag. 



Jackson's Ferry, N. Y. ; Europe. 



Cladophora gracilis, Griff. 



Beesley's Point, N. J. ; Rhode Island ;• Nahant, Mass.: Europe; 

 Australia. 

 Cladophora brachyclados, Mont. 



Texas. 

 Cladophora ltjteola, Harv. 



Key West ; Cuba. 

 Cladophora l^tevirens, Dillw. 



New York Bay; Boston Bay; California; Europe. 



Cladophora diffusa, Harv. 

 New York !. 



Cladophora fraota, Fl. Dan. 



Eastern coast ; in fresh and brackish water all over the world. 



