THE MARINE BOTANIST. 217 



HALYMENIA. 



Name meaning sea-membrane. 

 ^<- Frond compressed or flat, gelatinoso-membra- 

 naceous, consisting of a double membrane, separated 

 by a very lax network of articulated filaments; 

 cells of the membrane minute, coloured.'' Fruc- 

 tification : masses of spores (Javellidia) immersed 

 in the frond. 



HALYMENIA LIGULATA.— STRAP- 

 LEAVED HALYMENIA. 



A soft, membranaceous, pinky- red coloured 

 plant, very variable in the shape and branchings 

 of its fronds as well as in substance, but resolvable, 

 according to Dr. Harvey, into the three following 

 varieties : — " 1. dicliotoma. Frond six to eight 

 inches long, half a line to one or two lines broad, 

 compressed, very gelatinous, many times in an iiTe- 

 gularly dichotomous manner ; the divisions nearly 

 of equal breadth, becoming gradually narrower 



