MARINE ALGvE. 



77 



Sub-class III. 

 CHL R SPE BMEiE , or C ONFE B VALE S . 



Order XIV. SIPHONACE^E. 



Plants green, composed of continuous, tubular, or 

 branched filaments (elongated, cylindrical cells, con- 

 nected together into threads or filaments). Fructifica- 

 tion :• — 1. Spores green or purple, formed within the 

 cells, often, at maturity, vivacious, moving by means of 

 vibratile cilia ; 2. External vesicles containing a dense, 

 dark-coloured, granular mass, and finally separating from 

 the frond. 



LXXXVIII. Codium. 



Filaments combined into a spongy frond. Fructifi- 

 cation opaque vesicles attached to the filaments near the 

 surface of the frond. 



1. Codium Bursa. 



2. „ adherens. 



3. ,, amphibium. 



4. „ tomentosum. 



