THE MARINE BOTANIST. 305 



among the thin coating of sand which covers it, or 

 places close to the edge of low water-mark. C. 

 lanosa, on the contrary, is almost always found a 

 parasite on other algse -, or else attached to pieces 

 of wood, and to the leaves of Zostera." The fila- 

 ments are much slenderer than those of the follow- 

 ing kind, which it a good deal resembles, and it is 

 likewise a much smaller growing plant. 



(7. arcta. Grows on exposed rocks, generally 

 aoove half-tide level. Frequent. Filaments form- 

 ing broad somewhat starry tufts, of a full green 

 colour; much branched. Suhstaiice soft and re- 

 taining water. In the dry state young specimens 

 have a glistening appearance ; old ones, on the 

 contrary, are without gloss, except the young shoots 

 toward the summit ) woolly, and considerably 

 faded. 



C. glaucescens. Grows on rocks and tones 

 between tide-marks. Annual. Summer. Not 

 uncommon. Torquay. Falmouth Bay. Mount's 

 Bay, Cornwall. Mangan's Bay, co. Cork, Port- 

 mamock. Rocks beyond Kingstown harbour, 



