Marine Algce of Bemvick-on-Tweed. 303 



FUCUS (Linn.) Done, et Thur. 



Fucus serratus, Linn. 

 Sp. Plant, p. 1158. 



Descr. Fucus serratus, Harv., Phyc. Brit. 



Fig. „ ,, Harv., I.e. pi. 47. 



Exsicc. ,, „ Wyatt, Alg. Dan., no. 2 ; Crouan, Alg. Finist., 



no. 106; Le Jol., Alg. Mar. Cherb., no. Ill; Hohenack, Alg. 

 Mar. Sice, no. 32. 



Syn. Fucus serratus, /. Ag., Spec. Alg. i., p. 211 ; Ktz., Spec. Alg., p. 

 590; Ktz., Phyc. Gen., p. 352; Bornet et Thur., Etudes Phycol. 

 pis. 11-14. 



Hah. Very common on rocks and stones, from half-tide level to low- 

 water mark. Along the whole coast. All the year. Fruit 

 Winter. 



Fucus PLATYCARPUS, Thur . 



in Ann. Sc. Natur., 3rd Ser. xvi., p. 9, pi. 2. 

 Descr. Fucus platycarpus, Thur., I.e. 



Fig. „ „ Bornet et Thur., Etud. Phycol., pis. 16 and 17. 



Exsicc. ,, ,, Le Jol., Alg. Mar. Cherb., no. 8. 



Fucus vesicnlosus, var. spiralis, Crouan, Alg. Finist., no. 103. 

 ,, ,, var. evesiculosns, Crouan, Alg. Finist., no. 104. 



Hab. On rocks near high-water mark. Fruit all the year. Not 



uncommon. Berwick Bay, Scremerston, Holy Island. 



Apparently a common species on our coast, the fronds broader 



than those of Fucus vesiculosics, and without bladders. The 



receptacles are large and not so swollen as in the last-named 



species, and have a narrow margin formed of the unchanged frond. 



Fucus vesiculosus, Linn. 

 Sp. PL, p. 1158. 

 Descr. Fucus vesicnlosus, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 204. 



Exsicc. „ ,, Wyatt, Alg. Danm., no. 152; Crouan, Alg. 



Finist., no. 102; Hohenaclc, Alg. Mar. Sice, no. 31. 

 Hob. Very common all along the coast on rocks and stones between 



tide-marks. All the year. 

 The following are amongst the most distinct forms of this 

 variable species which occur at Berwick. 



F. SPH^ROCARPA, J. Ag. 



Gronl. Lam. ochFuc, p. 29. 

 "Ultimate divisions of the frond repeatedly forked, bearing 

 very numerous small receptacles " (Farlow, Mar. Alg. New Eng. 

 p. 101.) 



