Alphabetical List of Parasitical Algce of the Firth of Forth. 293 



Parasites 



alphabetically arranged, with periods of 

 duration, times of fructification, ifcc. 



Host Plants 



in the order of frequency, with periods 

 of duration. 



Ectocarpus tessellatus. 



July to September. 

 T. 



Elachista flacclda. 



June to September, 

 and August. 



Fruit in Au- 



Fruit, July 



Fruit, July 



Elachista fucicola. 



June to September, 

 and August. 



Elachista scutulata. 

 Summer and Autumn. 



Elachista (species?) 

 June, July, August. 



Enteromorpha compressa.' 



At all seasons. (''Autumn," 

 Crouan.) Usually on vncks. 



Laminaria saccharina. Perennial. 

 Laminaria digitata. Do. 



Himanthalia lorea. Perennial. 

 Halidrys siliquosa. Do. 



Fucus nodosus. Do. 



„ vesiculosus. Do. 



Fucus serratus. 

 „ vesiculosus. 



Perennial. 

 Do. 



Himanthaiia lorea. Perennial. 



At Earls 



ferry 

 in File. 



J 



Halidrys siliquosa. 



Perennial. 

 Ahnfeldtia plicata. 



Perennial. 

 Laminaria saccharina. 



Perennial. 

 Rhodymenia palmata. Biennial 



Corallina officinalis. Perennial. 



Cladophora rupestris. All the year. 



Chondrus crispus. Perennial. 



Halidrys siliquosa. Do. 



Ceramium rubrum. All the year. 



Lam. saccharina. Perennial. 



Cladophora Ijetevirens. March to De- 

 cember, and later. 



Chaetopteris plumosa. Perennial. 



Chorda lomentaria. March to No- 

 vember. 



Cladostephus spongiosus. Perennial. 

 „ djstichus. Do. 



Fucus ceranoides. Do. 



,, vesiculosus. Do. 



Ahnfeldtia plicata. Do. 



Chordaria flagelliformis. April to 

 November, and later. 



Polysiphonia fastigiata. Perennial. 



Callitham. arbuscula. Do. 



Rhodymenia palmata. Biennial. 



Dumontia filiformis. March to 

 October. Many plants survive 

 Winter. 



Polysiphonia nigrescens. Perennial. 



