472 
Forma edentata is very common along the Fseroese 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 (!); Bordo: »Skaarene« at the en¬ 
trance to Arnefjord (!); Vaago: north side (!); Ost.: Mjovenses (!), Ost- 
nses(T); Str.: Hojvig Flesen (!), Gliversnses (!); Svin 4 o (!); Myggenses (!); i 
St. Dim on (!); 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 Linne, Flora Lapponica, p. 350, No. 467, Species 
Plantarum, Tom. II, p. 1159, Holmise 1753; Systema Naturae, Editio 
Duodecima, Tom. II, p. 715, Holmiae 1767; Kjellm., N. I., p. 252 (202); 
Fucus platycarpus Thur., Etudes phycolog., p. 40; Fucus Areschougii 
Kjellm., Handb., p. 11; Fucus vesiculosus (3 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 (some more may be added to the 
list, cfr. e. g. Thuret and Kjellm an, 1. c.) must be regarded as 
belonging to Linne’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 me from Thuret’s Herbarium by Professor Sauva¬ 
geau — differs rather considerably from what, e. g. Kj ell 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 intermediate between these. And even amongst my Fseroese 
material I found a very few specimens or portions of plants which 
reminded one strongly of Fucus platycarpus Tliur., 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 
