Marine Algoe of the Dunbar Coast 279 



Order III— OOSPORES. 



Family.— VAUCHERIACE^. 

 VATJCHERIA, De Candolle. 



29. Vaucheria sphserospora, Nordst. ; forma genuina, Nord. ; and/or/nre 



dioica, Nord. 



On the sides of grass tufts near high- water mark, below the links, 

 at several places. Covered by the sea at high tides only. August 

 1888. (G. AV. T.) Certified by Nordstedt. 



Class III.— P H^OPHYCEiE]. 



Order IV.— PH^OZOOSPORE.ffi. 



Family.— SCYTOSIPHONACE^. 

 PHYLLITIS, Kiitz. 



30. Phyllitis fascia (i^. Dan.), Rke. {Laminaria fascia, kg.) 



On rocks and stones in pools at about half-tide level, especially 

 below the esplanade. Annual. March to November. Tricho- 

 sporangia in spring and summer. Rarely epiphytic on Fuciis vesi- 

 culosus and Clwndrus crispus. 



SCYTOSIPHON, Ag. 



31. Scytosiplion lomentarius (Lyngb.), J. Ag. {Chorda lomentaria, 



Lyngb. ) 



Usually on rocks in pools between tide marks. Annual March 

 to November. Trichosporangia in July and August. Host plants : 

 Cladophora rupestris, CoralUna officinalis, Polysiphonia fihrillosa. 



Family.— PUNCTARIACEvE. 

 LITOSIPHON, Harv. 



32. Litosiphon Laminariee (Lyngb.), Harv. 



Epiphytic on Alaria esculenta in pools near low- water mark, 

 and at a lower level. Annual. June to October. Fruit in 

 August. 



33. Litosiphon p\isillus (Carm.), Harv. 



Epiphytic on Chorda Jilurn, but not plentiful. Annual. Spores 

 escape in July and August. 



PUNCTABIA, Grev. 



34. Pvmctaria plantaginea (Roth), Grev. 



On rocks and stones in pools between tide marks. Occasionally 

 epiphytic on Algae. Annual. Summer and autumn. Not un- 

 common, especially below the esplanade in a large pool above half- 

 tide level, east of the stile. 



