472 



Formå edentata is very common along the Færoese coasts, and was 

 first reported by Landt, 1. c. p. 227 (Fucus inflatus); f. disticha was also 

 already mentioned by Landt, 1. c; it had formerly been observed on 

 Sydero only, but I found it to be common almost everywhere on ex- 

 posed coasts, viz. : — Vid.: Viderejde (!); Bord 6: »Skaarene« at the en- 

 trance to Arnefjord (!); Vaago: north side (!); Ost.: Mjovenæs (!), Ost- 

 næs (!); Str.: Hojvig Fiesen i!), Gliversnæs (!); Svino (!); Mj'ggenæs (!); 

 St. Dimon (!); Syd.: besides the habitats already known near Norbes 

 Ejde, Kvalbo Ejde and Famien it was found near Huddan at the entrance 

 to Trangisvaagfjord (!), Sumbo Holm (!), Muletangen near Vaags Ejde(!); 

 f. linearis was only found on Syd. near Famien (Lyngbye, Ostenfeld, !). 



153. F. spiralis Linné, Flora Lapponica, p. 350, No. 467, Species 

 Plantarum, Tom. II, p. 1159, Holmiæ 1753; Systema Naturæ, Editio 

 Duodecima, Tom. II, p. 715, Holmiæ 1767; Kjellm., N. I., p. 252 (202); 

 Fucus platycarpus Thur., Etudes phycolog., p. 40; Fucus Areschougii 

 Kjellm., Handb., p. 11; Fucus vesiculosus ^ spiralis (L.) Lyngb., 

 Hydrophyt., p. 3 (according to the specimens in his herbarium in 

 Copenhagen). 



f. typica. Fucus Areschougii Kjellm., the main form, Handb. 1. c. 



f. nana Kjellm., Handb., p. 11; Fucus limitaneus Mont., Thuret, 

 1. c. pp. 41 — 42; Fucus platycarpus var. limitaneus Sauvageau, 

 Sur les Algues du golfe de Gascogne, p. 35 (Journal de Botanique, 

 Vol. 11, p. 268). 



I am quite convinced that all the species mentioned here and 

 described by different authors (sorae more may be added to the 

 list, cfr. e. g. Thuret and Kjellman, 1. c.) must be regarded as 

 belonging to Linné's old species Fucus spiralis. Linne's description 

 in the works quoted is though short, yet fairly exhaustive, so a 

 sufficiently clear idea may be formed of what he meant. 



Now the alga named by Thuret Fucus platycarpus and figured 

 by him on tab. 16, 1. c. — original specimens of which were very 

 kindly sent to rae from Thuret's Herbarium by Professor Sauva- 

 geau — differs rather considerably from what, e. g. Kjell man 

 calls Fucus Areschougii and of which a typical example is to be 

 found in Areschoug's Exsicc. No. 54 (compare also my figure 94). 

 But to this I may remark that both in the Firth of Forth near 

 North Berwick and at Heligoland I gathered specimens which are 

 exactly intermediale between these. And even amongst my Færoese 

 material I found a very few specimens or portions of piants which 

 reminded one strongly of Fucus platycarpus Thur., e. g. the portion 

 of the plant given in fig. 95, the other parts of the same plant being 

 like the main species. My opinion is that Thuret's Fucus platycarpus 



