228 Marine Algce of Berwick-on-Tweed. 



Class IV.— K HODOPHYCEiE. 

 Order VII.— FLORIDE^E. 



Family — Porph y r avem . 



Porphyra. 



Diploderma. 



Bangia. 



Erythrotriehia. 

 Family — Squamariaceje . 



Peyssonnelia. 



Rhododermis. 



Petrocelis. 



Cruoria. 



Hsematocelis. 



Haematophleea. 

 Family — Hildenbra:nt>tiace.e. 



Hildenbrandtia . 

 Family — Wkangeliacea;. 



Chautransia. 



Spermothamniou. 

 Family — Ceramia cea: . 



Rhodockortou. 



Antithamnion. 



Oallithamnion. 



Grrimthsia. 



Ptilota. 



Grloiosiphonia. 



Ceramium. 

 Family — Cryptonemiacea;. 



Sarcophyllis. 



Fastigiaria. 



Dumontia. 

 Family — Giuartinacejk. 



Chondrus. 



G-igartina. 



Callophyllis. 



Ahnfeltia. 



Phyllophora. 



Cystoclonium. 



