266 THE MARINE BOTANIST. 



CALLITHAMNION. 



Name meaning a beautiful ahrub or plant, 

 " Frond Tosj or brownish red, filamentous; stem 

 either opaque and cellular, or translucent or jointed ; 

 branches jointed, one-tubed, mostly pinnate (rarely 

 dichotomous or irregular); dissepiments hyaline. 

 Fructification: 1. roundish or lobed, berry-hke 

 receptacles (favellce) seated on the main branches, 

 and containing numerous, angular spores; 2. ex- 

 ternal tetrasporeSy scattered along the ultimate 

 branchlets or borne on Uttle stalks." — Harv. 



CALLITHAMNION PLUMULA.— FEA- 

 THERY CALLITHAMNION. 



From two to five inches high, articulated 

 throughout : at each joint arise a pair of small 

 opposite ramuli ; these when examined by the help 

 of a pocket lens will appear pectinated along their 

 inner margins with pinnules, which in fine grown 



