Marine Algce of the Dunbar Coast. 291 



PHYLLOPHORA, Grev. 



111. Phyllophora Brodisei (Turn. ), J. Ag. 



On rocks in sandy pools near low-water mark ; also in deep water. 

 Perennial. Fruit in winter. Not uncommon. 



112. Phyllophora membranifolia (Good, and Woodw.), J. Ag. 



On rocks and stones, generally about low-water mark ; also at a 

 greater depth. Sometimes epiphytic on the roots of Laminaria 

 hyperhorea. Perennial. Fruit in winter. Always submerged. 



113. Phyllophora rubens (Linn.), Grev. 



In pools and under shelving rocks, especially at the west of the 

 castle, near the low- water mark of spring tides ; also in deep water. 

 Perennial. Fruit in winter. 



114. Phyllophora Traillii, Holmes, 



On shaded rocks or in pools at about the low-water mark of 

 spring tides ; sometimes amongst sponges. All the year. Fruit in 

 winter. 



CYSTOCLONIUM, Kiitz. 



115. Cystoclonium purpiirascens (Huds.), Kiitz. 



Common in pools and on exposed rocks from about half-tide 

 level to low-water mark. Annual. April to October. Fruit in 

 summer. The variety cirrliosa also occurs. 



Family.— RHODYMENIACE^. 

 CHYLOCLADIA, Grev. 



116. Chylocladia articvilata (Lightf.), Grev. 



On rocks in the shade, and sometimes epiphytic on Algje, near 

 low-water mark. Usually left uncovered by the tide for some hours 

 daily. Common, but usually of small size. Annual. April to 

 October. Fruit in Summer. Host plants : Lajninaria digitata, 

 Fueus serratus, Fucus vesiculosus, Polysiphonia nigrescens, Clado- 

 stephus spongiosus — all rarely. 



117. Chylocladia clavellosa (Turn.), Grev. 



Growing at the low-water limit of spring tides on rocks and 

 stones, and epiphytic on Algas. Annual. April to October. Fruit 

 in July and August. Host plants : Laminaria hyperhorea, Phyllo- 

 phora memhranlfolia, Pohjides rotundus, Fastigiaria furcellata. 



RHODYMENIA, Grev. 



118. IlhodyTnenia palmata (Linn.), Grev. 



Common on exposed rocks and in pools between tide marks ; 

 also epiphytic on Algse. Biennial. Granules in January and 

 February ; tetraspores in summer ; tubercles in June, July, and 

 August. Host plants : Ahnfeldtia plicata, Laminaria digitata, 

 Fucus seiTatus, Fucus vesiculosus, Chcetomorpha Melagonium, 

 Chondrus crispus — all more or less rarely. 



