CERAMIACE^l. 217 



sea. The water has not beeD changed, and is perfectly 

 clear and pnre. The plant has not grown much, as the 

 bottle is a small one, but its threads reach nearly to the 

 surface of the water, and no decay has taken place." 



Griffithsia secundipara. The side-fruited 

 Grifnthsia. 



Fronds growing in tufts, from four to eight inches long, 

 with a fan-shaped outline, rather gelatinous but firm, 

 jointed, forked, blunt at the tips, with short, horizontal 

 ramuli occasionally issuing from the lower branches; ar- 

 ticulations two to four times as long as broad, with a wide, 

 transparent margin. .Favellse not known ; tetraspores at- 

 tached to the inner sides of forked, incurved, involucral 

 branchlets, which are arranged in the form of an umbel at 

 the tips of very short side branches. 



This species slightly resembles G. setacea in appear- 

 ance, but it may easily be distinguished by its larger size, 

 and the blunt tips of its branches. I can find no record 

 of fruit on any British specimens, and though I have ga- 

 thered it somewhat abundantly in Jersey in the months 

 of June, July, and September, all my specimens are per- 

 fectly barren. I may add, that those collected in Sep- 

 tember are thicker, and of a richer colour, though not 

 so long as those gathered earlier in the year. I have 

 generally found them growing erect, at the bottom of 

 shallow, sandy pools. They adhere firmly to paper, 

 but, like all other Grrifnthsias, must be laid out in salt 

 water. 



Grifnthsia corallina. The coral-like Griffithsia. 



Fronds tufted, from two to six or eight inches long, very 



