THE MARINE BOTANIST. 105 



laginous, dark vinous red, with an imperfect or 

 obsolete midrib, and alternately toothed margin. 

 Fructification, 1. Ceramidia, containing spores; 2- 

 Lanceolate pods (stichidia), containing tetraspores. 



ODONTHALIA DENTATA.— TOOTHED 

 ODONTHALIA. 



Fronds tufted, from three to twelve inches in 

 length, much branched in an irregular pinnate man- 

 ner, with a slight and imperfect midrib at the base ; 

 branches narrow toothed or pinnatified. Fructifica- 

 tion borne on little slender hair-like stalks along the 

 margin of the frond. Substance between cartila- 

 ginous and membranaceous. Colour a deep red, 

 becoming darker in drying. Grows on rocks in the 

 sea, in fruit, from January to March. Frequent on 

 the shores of Scotland, and the north of England 

 and Ireland. 



