THE MARINE BOTANIST. 321 



morpha. The wide flattened variety of E. intes- 

 tinalis may perhaps be at times mistaken for this 

 species ; but the former may be known from it by 

 its obtuse tips, which in U. Linza are taperedy and 

 the colour is a finer and more delicate green. 

 Grows on rocks and stones in the sea. Annual. 

 Summer. 



PORPHYRA. 



Name, meaning imrple-coloured. 



Frond plane, exceedingly thin, and, owing to the 

 fructification, of a purple colour. Fructification 

 1. scattered sori of oval seeds ; 2. roundisL 

 ^m;^^^Z^5 mostly arranged in a quaternate manner. 

 — Grev, 



PORPHYRA LACINIATA.— €LEFT POR- 

 PHYRA. 



Frond very i.iregu lar, cleft, four to eight inches 

 long, or thin and delicate, often fixed by the centje 

 to its place of growth. Colour a fine purple. 



Y 



