confervace^:. 267 



Cladophora nuda. The bare Cladophora. 



Fronds growing in lax tufts, about three inches high, 

 rigid, slender, straight, forked, of a dull-green colour, 

 slightly branched ; branches distant, erect, almost bare ; 

 branchlets few, robust, blunt at the tip, set on to the branches 

 at a very acute angle ; cells very long, with wide, transparent 

 margins. 



This is a doubtful species founded on specimens 

 gathered long since "on basalt rocks, between tide- 

 marks, at Port Stewart, co. Antrim, by Mr. D. Moore." 



Cladophora Balliana. Miss Ball's Cladophora. 



Fronds growing in tufts, about nine inches long, very 

 slender, of a grass-green colour and soft texture, much 

 branched ; branches much divided in an alternate manner, 

 intricate, somewhat virgate; branchlets very slender, secund, 

 tapering at the tip, generally one- or two-celled ; cells many 

 times the length of their diameter, those above shorter than 

 those below, all filled with dense granular endochrome, and 

 surrounded by a broad transparent border. 



This species was discovered at Clontarf by Miss Ball, 

 and was considered by Dr. Harvey to be distinct from all 

 British Cladophora. 



Cladophora fracta. The broken Cladophora. 



Fronds growing in tufts, at first attached, then floating 

 free, in masses of considerable size, entangled, rather rigid, 

 from six inches to a foot long ; branches distant, several 

 times forkedly divided, spreading ; branchlets few, alternate 

 or secund, not always present ; axils of the branches very 

 wide ; cells from three to six times the length of their dia- 



