MARINE ALGiE OF THE UNITED STATES. 703 



CERAMIUM DESLONGCHAMPSII, Ch. 



Nahant, Mass., and northward ; Europe: Tasmania. 



Ceramium diapiianum, Roth. 



Occasionally found on the New England coast; California; 

 Europe ; Cape of Good Hope ; Australia. 



Ceramium stricttjm, Harv. 



New England ; Europe. 

 Ceramium Youngii, Farlow, mscr. 



Canarsie, L. I. 

 Ceramium tenuissimum, Lyngb. 



Key West ; Europe. 



Ceramium fastigiatum, Harv. 



Southern New England ; Europe. 



Ceramium byssoideum, Harv. 

 Key West. 



Ptilota densa, Ag. 



Southern California. 



Ptilota hypnoides, Harv. 

 California. 



Ptilota asplenioides, Ag. 

 Oregon, northward. 



Ptilota plumosa, Ag. 



East and west coasts. Var. JiUcina, west coast. Var. serrata. 

 New England from Nahant northward ; also northwest coast; 

 Northern Europe. 



Ptilota elegans, Bonnem. 



New York, northward ; Europe. 



Gloiosiphonia capillaris, Carm. 



Long Island Sound to Cape Ann, Mass.; Europe. 



Crouania attenuata, J. Ag. 



Key West; Europe; Australia. 



Halurus equisetifolius, Kiitz. 

 New York *? ; Europe. 



Griffithsia corallina?, Ag. 



New York to Gloucester, Mass. ; Europe; Australia. 



Callithamnion arbuscula, var. Pacijica, Ag. (0. Pikeanum, Harv.). 

 California. 



Callithamnion tetragonum, Ag. 



New York to Cape Cod ; Europe. 



Callithamnion Baileyi, Harv. 

 New York, southward. 



Callithamnion ptilophora, Eaton, mscr. 

 California. 



