152 SEA MOSSES. 



way. This constitutes the chief beauty, as it is the 

 most conspicuous peculiarity of the plant. 



The ultimate ramuli of the young plants, and of 

 the young parts of the old ones, are apt to be fibrilli- 

 iferous, in a manner not unlike P. fibrillosa, but the 

 method of branching and the general aspect of the 

 plant will easily distinguish it from that. 



It is reported all along the coast from Halifax to 

 New York. Miss Booth found it rare at Peconic 

 Bay. I found many specimens of it at Wood's Holl, 

 but took none at Newport, all summer. During several 

 years' collecting at Marblehead, I do not remember 

 to have seen it there, though Mr. Collins finds it 

 abundant along that coast, and Mrs. Davis collects 

 it all summer, on Canal Beach, Gloucester. 



POLYSIPHONIA BaILEYI, Ag. 



The three following California members of this 

 genns which I shall undertake to give an account of, 

 I have put by themselves, not on account of natural 

 afSnity, but for convenience of describing them. And 

 yet they are not far apart in the natural system. This 

 is certainly a very distinct and well marked species, 

 like P. fastigiata, one which when once seen can never 

 be forgotten, or be henceforth unrecognized. 



It grows from three to six inches high, the stem 



