373 
Str.: Gliversnaes (!), Kalbakfjord (H. J.); Ost.: Glibre and Molen(!); 
Kolter (!); Syd.: Kvalbo (!), Trangisvaag (Ostenfeld, II. J.), Vaagfjord 
(H.J.). 
40. P. Brodiaei (Dillw.) Grev. Kjellm., N. I., p. 156 (120); Hut- 
chinsia Brodiaei Lyngb., Hydrophyt., p. 109. 
The specimens from my collections generally correspond in the 
main with the Faeroese examples which are to be found in Lyng- 
bye’s Herbarium, but they do not agree exactly with his figure 
(1. c. tab. 33) which Kjellman quotes under forma Lyngbyei Kjellm. 
A few examples, e. g. from Kollefjord, agree fairly well with Are- 
schoug’s Exsicc., No. 64; others again are small and somewhat 
suggest Kiitzing’s figure in Tab. Phyc., Vol. 14, tab. 1. 
This species belongs to the littoral zone and occurs near low- 
water mark often in rock-pools. It is met with both on much ex¬ 
posed coasts and in sheltered localities. It grows on rocks and 
often gregariously in fairly large quantities. 
This species is rather widely distributed along the coasts of the 
Faeroes as it has been found in the following localities: — Ost.: Molen(!), 
Ejde (H. S.; !), Naes (Lyngb., H. S.J; Str.: Kvivig (!§ Kollefjord (H. S., !), 
Thorshavn (H. J.); St. Dimon (!); Syd.: Kvalbo Ejde (H. S.), Trangisvaag 
(Ostenfeld,!). 
41. P. atrorubescens (Dillw.) Grev. J. Ag., Spec. Alg., Vol. 2, 
pars 3, p. 1035; Greville, Scottish Cryptogamic Flora, Vol. IV, tab. 210; 
Hutchinsia atrorubescens Lyngb., Hydrophyt., p. 110. 
Sublittoral. The specimens few in number and sterile. They 
occurred amongst some other Polysiphonia- species from Trangisvaag- 
fjord which were gathered by Ostenfeld from a depth of some 
3—4 fathoms in a plaice net. 
Lyngbye (1. c. p. 110) reports this species as occurring along the 
coasts of the Faeroes, but no specimens of it are to be found in his 
herbarium. Agardh (1. c. p. 1037) also mentions not having seen any 
specimens gathered by Lyngbye and hence he is of opinion that the 
species mentioned by the latter can hardly be the one in question, but 
as this has now been actually found in the Faeroes it is very possible 
that it was already discovered by Lyngbye. 
As Lyngbye’s Herbarium contains no specimens of his Hut- 
chinsia badia , reported in Hydrophyt., p. 114, no opinion can be 
formed as to what it really is. 
42. P. nigrescens (Huds.) Harv. Kjellm., N. I., p. 162 (126); Hut¬ 
chinsia nigrescens Lyngb., Hydrophyt., p. 109. 
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