236 THE MARINE BOTANIST. 



liable to stain the paper on which they are dried, 

 of a pink colour, but G. setacea parts with its 

 colouring matter directly on coming" in contact 

 with fresh water. Two new species have been 

 discovered by the Rev. W. S. Hore, at Ply- 

 mouth, and the beautiful and rare G. barhata has 

 been found growing- on alg*se, at Jersey, by Miss 

 Turner. Wrangelia chiefly differs from Griffithsia 

 in having scattered tetraspores. In Seirospora the 

 tetraspores are in bead-like strings, a character 

 which separates the genus from Callithamnion ; this 

 latter is an extensive genus containing thirty-one 

 species ; many of them are most beautiful and ex- 

 quisite little plants of a rosy or pink colour, with 

 finely divided feather-Hke branchlets. The follow- 

 ing poetic description, by Bishop Mant, though 

 appHed by him to a different class of plants, equally 

 well portrays this delicate and no less lovely growth 

 of the ocean : — 



" Soft as the cygnet's downy plume, 

 Or produce of the silk- worm's loom ; 

 Survey them by the unaided eye, 

 And if the seeds within you lie 



