RED ALGy^. 263 



Callithamnion Borreri, Ag. 



This, and the two following species, may not be so 

 easily made out, and distinguished from each other at 

 first, as those already described. Yet, when they are 

 once known, the distinguishing points will be easily 

 recognized. The geographical range of this species, 

 on our coast, is limited to the waters on the south 

 shores of New England and New York. 



It grows in dense, soft tufts, two or three inches 

 high. The frond is of capillary fineness, the branches 

 long and widely spreading, the lower half of the 

 branches mostly bare, the upper half divided and 

 subdivided, alternately, many times, the ultimate branch- 

 lets being long and slender, and not unfrequently 

 turned back in graceful curves. The little plumes 

 which the ultimate branchlets form, are made by 

 arranging the ramuli on the two sides of the branch, 

 like the pinnae of a fern along its rachis or stalk. 



The color is a fine, brilliant red. I have collected 

 it in summer and late fall, at Newport and Wood's 

 Holl. Miss Booth found it not very plenty at Orient 

 in August, washed ashore from deep water. 



Callithamnion byssoides, Arn. 



Beginners will more easily confound this species 

 with the last, than with any other, and yet it differs 



