296 THE MARINE BOTANIST. 



growing" ; without gloss, and grayish when dry ; 

 branches erect, spreading; uppermost ramuli 

 secund. Annual. Summer. Frequent on rocks, 

 stones, and algae in tide-pools. 



SUMMARY OF THE BRITISH MARINE 

 SPECIES OF CLADOPHORA. 



C» BrowniL Grows in situations exposed to the 

 dripping of fresh water, and the occasional over- 

 flow of the tide. In a cave near Dunree, North of 

 Ireland ; and in one near Black Castle, Wicklow. 

 Cornwall coast, near the Land's End. Forms 

 cushion-like tufts; erect, rigid, of a black-green 

 colour when growing; ^^but, on having the water 

 expressed and held to the light, exhibits a beautiful 

 yellow- green colour." Dr. Harvey describes it as 

 a very curious and distinct species ; to the naked 

 eye, having a good deal the appearance of Vau- 

 cheria terestris, but totally diflFerent in structure, 

 and perhaps allied to C, cegagropilay a curious 

 plant found in fresh-water lakes. 



