THE MARINE BOTANIST, 177 



RHODYMENIA BIFIDA.— THIN-CLEFT 

 RHODYMENIA. 



Fronds tufted one or two inches high, irregu- 

 larly cleft, thin and transparent. Colour a pink or 

 brownish red. Tubercles usually confined to the 

 margin. Tetraspores forming cloudy spots on the 

 upper part of the frond. '' Var. /S ciliata : frond 

 somewhat thicker than usual, opaque, brownish 

 red, naiTow, much divided; the margins fringed 

 with leafy cilia." — Harv. Grows attached to rocks 

 and algae. Annual. Summer. Frequent on the 

 southern shores of England and Ireland. Rare in 

 Scotland. Ardrossan. Saltcoats. Kilbride. Whit- 

 bum and Tynemouth. Jersey. /3 ciliata, Belfast 

 Bay. Carrickfergus. 



RHODYMENIA LACINIATA.— THICK- 

 CLEFT RHODYMENIA. 



Frond rather thick cleft in more or less of 

 a palmate or fan-shaped form, the segments 



