

Contribution. I. 



21 



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Gen. Polyides Ag. 



Spee. Alg. Ij p. 390, 



Polyides rotundus (Gmel.) Grev. 



Alg. Brit. p. 70; Fucus rotundus Gmel, Hist. Fuc. p. 110. 

 Beser, Polyides lumbricalis J, G. Ag. Spee. Alg. 2, p. 721. 

 Fig. Polyides rotundus Harv. Pliyc. Brit. t. 95. 



Eæsicc, .. 



I 



Arescli. Alg. Scand. exsicc. No. 252. 



Si/n Fucus caprinus Gunn. Fl. Norv. 1, p. 96 etin Act Nidros. 



p. 83. 

 Furcellaria rotunda Sommerf. in Act. Nidros. p. 51. 



This alga is chiefly litoral, growing on rocks at low- 

 water mark, or in rock-pools, but it also occurs in tbe up- 

 per part of the sublitoral zone, ona depth o£about4 fathoms. 

 The specimens are small and often rather slender, but still 

 they approach most nearly the typical form. I have tåken 

 specimens bearing tetraspores at the end of June. 



Distributi&n: Scattercd and scarce alongthe openshore, 

 and not met with in the inner part of the great fjords. 



Fam. Delesseriaceæ J. Gr. A 



Epicr. p. 444. Cfr. Alg. med. p. 155. 



to' 



Gen. Delesseria (Lamour.) J. G. Ag. 



Epicr. p. 477; Lamour. Ess. p. 122; ex parte. 



Delesseria alata (Huds.) Lamour. 



Ess. p. 124; Fucus alatus Huds, Fl. Angl. p. 578. 

 Descr, Delesseria alata J. G. Åg, Epicr. p. 483. 



„ „ Harv. Phyc. Brit. t. 247. 



„ „ Arescb. Alg. Scand. exsicc. No. 75. 



Bxiicc. 



Syn. Delesseria alata Kleen, Nordi. Alg. p. 14. 



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„ var. augustissima Kleen 1. c? 

 ang-ustissima lyellm. Ish Algfl. p. 172? 



Fucus alatus Gunn. Fl. Norv. 2, p. 91. 



Wg. Wg. Fl Lapp. p. 493, 



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