Marine Algce of the Dunbar Coast. 281 



from near liigli-water mark to about lialf-tide level. Annual. 

 Spring and summer. 



41a. Myriotricliia clavseformis, yav. Jiliformis {B.a.rv.), Farlow. 

 Associated with the preceding. Annual. Spring and summer. 



ECTOCARPUS, Lyngb. 



42. Ectocarpiis confervoides (Roth), Le Jolis. {Edocarpus siliculosus, 



Lyugb.) 

 Epiphytic on Algte in pools between tide-marks. Annual. May 

 to September. Fruit in June and July. Host plants : CoralUna 

 officinalis, Cladophora riijiestris, Sctjtosijjhon lomentarius, Ghordaria 

 jiadellifonnis:, Halidrys siliquosa, Asperococcus echinatus, Chorda 

 filum, Pohjsiplwnia elongata, Laminaria phyllitis, Polysiphonia 

 urceolata, Mijriotrichia clarceforinis, &,c. 



43. Ectocarpus granulosus {Eiig. Bot.), Ag. 



In pools near low-water mark. Annual. April to October. 

 Fruit from May to September. Kather rare. Chiefly in pools 

 below the esplanade. Epiphytic on Ceramium rubrum and Lamin- 

 aria saccharina. 



44. Ectocarpus hyemalis (?). 



In pools above half-tide level, below the esplanade ; rare. 



45. Ectocarpus insignis, Crouan. 



Occurs near low- water mark in shaded pools below the esplanade ; 

 also epiphytic on small Algte. Annual. Fruit in summer. Found 

 by E. M. Holmes in 1884, 



46. Ectocarpus secundus (?), Kiitz. 



Epiphytic on Pundaria plantarjinea in shallow pools at the 

 esplanade stile. Annual. May to September. 



47. Ectocarpus tomentosus (Huds.), Lyngb. 



Epiphytic on Fucus vesiculoms, Fucus serratus, Himanthalia 

 lorea, and other Algse, near low-water mark, especially at the 

 " Vault." Annual. April to September, Fruit in summer. 



48. Ectocarpus velutinus (Grev.), Kiitz. {Elaehista velutina, Fries.) 

 Epiphytic on Himanthalia lorea; usually associated with Ela- 



chida scutulata. Annual. June to October. Fruit in July and 

 August. 



ISTHMOPLEA, Kjtll. 



49. Isthmoplea sphaerophora (Harv.), Kjell. {Ectocarpus sphccropliorus, 



Carui.) 



Epiphytic on Algse in caverns, and on exposed rocks, between 

 tide marks. Generally fine and common at the east of the -'Vault." 

 Annual. April to September. Fruit from May to August, Host 

 plants : Ptilota eleijansy CladojjJiora nqjestris, Callithamnion arbus- 

 cula, &c 



