72 SEA MOSSES. 



IV. Frond cylindrical, filiform. 



Frond branched from leading stem, branches 

 short, thick as pack-thread. Plant four 

 to ten inches high. Color black. 



Chordaria. 



V. Frond tuberform. 



Frond inflated, massed, thin and soft, yel- 

 low olive, from one to three inches 

 through. Asperococcus sinuosus. 



§7^ 



