THE MARINE BOTANIST, 



LITOSIPHON LAMINARI^.— THE ALARIA 

 LITOSIPHON. 



Grows on tufts of a quarter to half an inch in 

 height upon the leafy portion of Alaria esculenta. 

 Fronds marked by transverse bands placed near 

 each other; spores four or more in each band. 

 Colour, a dull olive brown. Annual. Summex. 



CHORDARIACEyE.— CHORDARIA TRIBE. 



Sea plants of an olive colour, with a gelatinous or 

 (rarely) cartilaginous frond, composed of articulated 

 filaments interlaced together. Spores attached to 

 the filaments, concealed within the substance of the 

 :frond. 



In form the fronds of these plants diifer widely 

 from each other ; the loosely gelatinous structure is 

 clearly shown in Mesogloia, and is less apparent 

 in Ralfsia than in any of the genera. Ralfsia 

 deuster, the only species of this genus, is described 



