82 



LIST OF THE BRITISH 



5. Enteromorpha erecta. 



6. clathrata. 



7. „ ramulosa. 



8. „ Hopkirkii. 



9. „ percursa. 



XCVI. Ulva. 



Frond membranaceous, flat, of a green colour. Fruc- 

 tification minute granules. 



1. Ulva latissima. 



2. „ Lactuca. 



3. „ Linza. 



XCVII. PORPHYEA. 



Frond flat, purple, exceedingly thin. Fructification : 

 — 1. Scattered sori of oval seeds; 2. Roundish gra- 

 nules, mostly covering the whole frond. 



1. Porphyra laciniata. 



2. „ vulgaris. 



3. „ miniata. 



XCVIIT. Bangia. 



Frond filiform, tubular, mostly purple or pink. 

 Spores purple or green. 



