292 Mr George Traill on the 



PLOCAMIUM, Lamour. 



119. Plocamium coccineum (Huds. ), Lyngb. 



On rocks, and sometimes epiphytic on Algse, in deep water. 

 Karely growing between tide marks, and then of small size. 

 Perennial. Fruit in summer. Common and fine. Host plants : 

 Laminaria hyperhorea, RJiodomela lycopodioides, Polyides rotundus, 

 Odonthalia dentata. 



EUTHORA, J. Ag. 



120. Euthora cristata (Linn.), J. Ag. {Ehodymenia cristata, Grev.) 

 Epiphytic on the stems and roots of Laminaria hyperhorea. 



Annual. Summer. Rare. 



HYDROLAPATHTJM, Rupr. 



121. Hydrolapathvun sangviiiieiiin (Linn.), Stackh. {Delesseria san- 



ffuinea, Lamour.) 



Growing in deep rock pools near low-water mark, also under 

 projecting ledges of rock, in the shade; rarely ' epiphytic on Algae. 

 Larger specimens in deep water, especially in tide- ways. Biennial. 

 Fruit from November to March inclusive. Common. 



Family.— DELESSERIACE^. 

 NITOPHYLLUM, Grev. 



122. Nitophyllum Bonnemaisoni, Grev. 



In deep water, epiphytic on Laminaria hyperhorea. Annual. 

 Summer. Rather rare. 



123. Nitophyllxun laceratum (Gmel.), Grev. 



On rocks near the low-water mark of spring tides, and epiphytic 

 on the stems of Laminaria hyperhorea, in deep water. The 

 specimens are often fine. Annual. May to September. Fruit in 

 July and August. The variety Smithii also occurs. 



124. Nitopliylluni pvmctatum (vStackh. ), Grev. 



Epiphytic on Algfe in pools at about the low-water mark of 

 spring tides. Large specimens epiphytic on Laminaria hijpierhorea 

 in deep water. Annual. May to September. Fruit in July and 

 August. The variety ocellatum also occurs. 



DELESSERIA, Grev. 



125. Delesseria alata (Huds.), Lamour. 



On rocks, and epiphytic on Algae at and below low-water mark. 

 All the year. Fruit from March to May. Host plants : Laminaria 

 hyperhorea, Rhodomela lycopodioides, Ptilota elegans, Ptilota 

 jjlunwsa, Gladostep>lius spongiosus, &c. 



126. Delesseria sinuosa (Good, and Woodw.), Lamour. 



On rocks, and epiphytic on Algae, either in deep pools between 

 tide marks or at a lower level. Biennial. Fruit in winter and 



