Marine Algce of the Dunbar Coast. 277 



on Algffi. Vegetates at all seasons. Fruit in spring and summer. 

 Host plants very numerous. 



12. Enteromorpha erecta (Lyiigb.), Hook. 



In rock pools at about half-tide level; also in deep water. 

 Annual. Spring and summer. 



13. Enteromorpha intestinalis (Linn.), Link. 



Common, cliiefly in brackish water. Annual. April to 

 September. 



14. Enteromorpha Iiinza (Linn.), J. Ag. {Ulva Linza, Linn.) 

 Common in pools at about half-tide level. Annual. May to 



September. 



15. Enterom^orpha percursa (Ag.), Hook, 



In shallow pools near high-water mark, below the links, at the 

 west of the burn. Annual. Spring aad summer. 



UXVA, Linn. 



16. Ulva lactuca, Linn. {Ulva latissima, Harv.) 



Common on rocks and stones, and epiphytic on Algte, in pools 

 between tide marks. All the year. In best condition in May, 

 June, and July. Host plants numerous. Perhaps the most frequent 

 are : Cladopliora Icetevirens, Cladophora rupestris, Corallina ofici- 

 nalis, Ceramium rubrum, and Cladostephus spongiosus. 



Family.— CONFERVACE^. 

 CH^TOMORPHA, Kiitz. 



17. Chsetomorpha Melagonium (Web. and Mobr), Kiitz. {Conferva 



mclagonium, Harv.) 



Common in pools near low-water mark. Fronds often from 1 2 

 to 1 5 inches in length. Perennial. Fruit in summer. 



18. Chaetomorpha tortuosa (Dillw. ), Kleen. {Ccmferva tortuosa, Harv.) 

 On rocks, and epiphytic on CJiondncs crispus and Corallina 



officinalis, in pools at about half-tide level. Very abundant at 

 the west of the cliffs. Annual. May to October. Plants some- 

 times live over the winter. Spores escape towards the end of 



Jidy. 



ULOTHRIX, Kiitz. 



19. Ulothrix flacca (Dillw.), Thuret. {Lyngbya flacca, Harv.) 



On rocks, and epiphytic on Algae, near high-water mark, usually 

 in the shade, often associated with Ulothrix isogona. Annual. 

 iS"ovember to August. Fruit in winter and spring. Spores escape 

 in May and June. Host plants : Fucus vesiculosus, Fucus plati/- 

 carpics, Rhodocliorton Rothii, Corallina oficinalis. 



20. Ulothrix isogona (£"71^. Bot.), Thuret. {Conferva Youngana, Dillw.) 

 Associated with the above. Annual. November to August. 



Fruit in winter and spring. Spores escape in May and June. 



