300 THE MARINE BOTANIST. 



hig'h, slender, very straig'ht, dull green, olivaceous 

 when dry. In the straight filaments and erect 

 ramuli, '^ it resembles/' says Dr. Harvey, " C. ru- 

 pestris, but differs in colour, and in the great length 

 of the joints." A doubtful species, which may per- 

 haps prove only a variety of C. rupestris. 



C, Magdale7icB,^-Phyc, Brit,, PL 355., A. 

 Found at Jersey, by Miss Magdalen Turner. 

 ^^ Filaments, in the only specimen examined, about 

 an inch long, matted together but not tufted, ap- 

 parently growing either prostrate or entangled 

 among the bases of other algae, not much branched. 

 Colour a dark dingy green. Unlike as it is in 

 general aspect and ramification to C. rupestris, the 

 cells under the microscope strongly resemble those 

 of that species 5 yet I can hardly think it next of 

 kin to that straight growing plant, and perhaps 

 C. fracta is more nearly related." — Harv, in Phyc. 

 Brit. 



C, rupestris. See description. 



C, Icetevirens. Ditto. 



C, Jlexuosa. In salt-water ditches, near Yar- 



