THE MARINE BOTANIST. 309 



rocks at the extreme verge of low water-mark. 

 Annual. Summer. Generally distributed, but not 

 very frequent anywhere. 



CONFERVA ^REA.—BRITTLE CON- 

 FERVA. 



Filaments three to twelve inches long, tufted; 

 of much less diameter than in C. Melagonium, and 

 of a yellow-green colour. It differs also from the 

 foregoing, in breaking easily at the joints ; the 

 colour fades considerably when dried. Grows on 

 sand-covered rocks and in sandy pools. Annual. 

 Summer. Frequent. 



0. S. C, arenosa. On the flat sandy shore about 

 half-tide level. Appin, Argyleshire. Bantry Bay. 

 ^^ This species occurs in places a yard or more in 

 extent, and of a peculiar structure. They consist 

 of several exceedingly thin layers placed over each 

 other, but so slightly connected that they may be 

 separated like folds of gauze, to the extent of many 

 inches, without the least laceration." 



