Plate LXI. 



Fig. 284. CODIUM BURSA. 



Colour. Dark green. 



Substance. Stiffly and densely spongy. 



Character of Frond. An irregularly round lump; composed of interwoven 

 threads {filaments), densely matted together; hollow when old; several, 

 . of different ages and sizes, growing together in groups. 



Measurement. From 1 to 8 inches in diameter. 



Fructification. Little egg-shaped sacs {sporangia), containing a dark-green 

 substance, which changes at maturity into seeds (zoospores ; so called 

 from having at one period a motion as if endowed with animal life) ; 

 attached to the outer threads {filaments) of which the frond is 

 composed. 



Habitat. South coast of England. Jersey. Cornwall. Torquay. Not 

 uncommon at Brighton. Very rare generally. 



Fig. 285. CODIUM TOMENTOSUM. 



Colour. Dark green. 



Substance. Soft; densely spongy. 



Character of Frond. Cylindrical, or somewhat compressed, smooth stem and 

 branches, often thicker than a swan's quill throughout; more or less 

 repeatedly but irregularly forked; sometimes beset with short side- 

 branches. 



Measurement. From 3 to 12 inches long. 



Fructification. Little egg-shaped sacs {sporangia), containing a dark-green 

 substance, which changes at maturity into minute seeds {zoospores ; 

 so called from having at one period a motion as if endowed with 

 animal life); attached to the outer threads {filaments) of which the 

 frond is composed. 



Habitat. South and west coasts of Great Britain chiefly. Devonshire. 

 Scilly. Miltown Malbay, &c. 



Some specimens of this plant are much oftener divided and re-branched than 

 others, and form a circle when laid out. For other Codiums, see next Plate. 



47 



