DR. Е. ВОКСЕЗЕХ ON FUCUS SPIRALIS, LINNÉ. 119 
else to do but to refer Fucus platycarpus as а variety of Linné’s oid species 
Fucus spiralis, L. We then not only agree with the adopted nomenclature- 
rules (cfr. Verhandlungen des intern. bot. Kongresses in Wien, 1905, Jena 
1906), but it so fortunately happens that Linné’s old species, var. typica as 
I call it, Һа by far the largest distribution ; just to mention опу one side of 
the Atlantie Sea, it occurs from the North Cape to the Canary Islands, while 
var. platycarpa mainly occurs on the Atlantic coast of France and in the 
Channel, 
As to var. limitanea (Mont.), I shall, referring to Prof. Sauvageau's 
account (Bot. Færöes, p. 411), only emphasize that one ought to use 
Montagne's name for this dwarf form which, if it is the same as my forma 
папа from the coast of the Færöes, is due to the exposed locality, just as is 
forma disticha of Fucus inflatus ; the size also of Fucus spiralis and of Fucus 
inflatus is also entirely dependent on this. As this dwarf form, at all events 
the Færöese one, differs in nothing else from var. typica, it ought to be 
referred as a forma limitanea of this variety. 
Summing up shortly, I contend to have proved :— 
(1) That we are able to form a sufficiently certain opinion as to the identity 
of Fucus spiralis, L. 
(2) That we accordingly ought to write Fucus spiralis, L., as the name of 
the species, with the varieties :— 
Var, typica, Borgs. (=f. typica, Borgs. 1. c.), with f. limitanea (Mont.) 
=f. папа, Kjellm. (Bórgs. 1. c.) ; and 
1. 
Var. platycarpa (Thur.), Borgs. L c. 
EXPLANATION OF PLATE 9. 
Fucus spiralis, Linn. 
The upper figure is reduced by nearly one-third trom the Linnean type-specimen; the 
legend “4 spiralis” is in Linné’s handwriting at the bottom of the sheet, close to which 
Sir J. E. Smith has written in pencil * Lightfoot's" [species], implying that Lightfoot's 
description in his * Flora Scotica,’ p. 911, suits this plant. 
The lower figure is a portion also reduced by one-third from a second sheet pinned 
by Linné to the previous sheet; he has also written at the foot * 4 spiralis,” but this plant 
is regarded as quite distinct from the former, cf. p. 112. 
The very dark hue of these Fuci has rendered their reproduction by photography very 
difficult; it will be seen that they are illuminated from the side, so аз to emphasize difference 
in elevation. 
