Marine Algce of the Dunbar Coast. 28 



SACCORHIZA, De la Pylaie. 



69. SaccorMza bulbosa (Hiuls. ), De la Pylaie. {Laminaria hulbosa 



(Huds.), Lam.) 

 In deep water. Perennial. Fruit in autumn. 



LAMINARIA, Lamour. 



70. Laminaria dig-itata (Linn.), Edm. 



On rocks at about low-water mark. Perennial. Fruit in winter. 

 The variety stenoplujlla, Harv., also occurs. 



71. Laminaria liyperborea (Gunn), Foslie. [Lamviiaria digitata, Linn., 



partim.) 



In deep water. Perennial. Fruit in winter. 



72. Laminaria saccharina (Linn.), Lamour. 



In pools near low-water mark, also in deep water. Sometimes 

 epiphytic on other Alg£e. All the year. Fruit in summer and 

 autumn. 



72a. Laminaria saccharina, var. Phyllitis (Stackh. ), Le Jolis. 



In pools near low-water mark, also in deep water. Eather 

 uncertain in its appearance. " Fruits without growing to a large 

 size, while small plants oi Lammaria saccharma" — with which it 

 is often confounded — "growing along with it, do not "(J. M'Bain). 

 Annual. Spring and summer. 



Order V.— FUCOIDEiE. 



Family.— FUCACE^. 



HALIDRYS, Lyngb. 



73. Halidrys siliquosa (Linn.), Lyngb. 



Common in pools at and below half-tide level. Always sub- 

 merged. Larger plants in deep water. Perennial. Fruit in winter. 

 Spores escape in April from the plants growing between tide marks. 

 A slender feathery variety also occurs in pools between tide marks. 

 It accompanies the common fonu, but does not seem to pass into it, 

 and may be looked upon as a permanent variety. 



FUCUS, Linn. 



74. Fucus ceranoides, Linn. 



On rocks and stones between tide marks, chiefly at the mouth of 

 the burn at the links. Perennial. Fruit in spriug and summer. 



75. Fucus platycarpus, Thuret. 



Common on rocks below the Coast-Guard House, east of the 

 old pier, from near high-water mark to about half-tide level, and 

 occasionally at a lower level. Usually growing in the shade, and 

 left uncovered by the tide for some hours daily. Perennial. 

 Sporangia all the year. Spores escape in August. 



