373 



Str.: Gliversnæs !), Kalbakfjord II.J); Ost.: Glibre and Molen (!); 

 Kolter !; Syd.: Kvalbo !), Trangisvaag (Ostenfeld, II. I., Vaagfjord 

 (H. J.). 



40. P. Brodiæi (Dillw.) Grev. Kjellm., N. I., p. 156 (120); Hut- 

 chinsia Brodiæi Lyngb., Hydrophyt., p. 100. 



The specimens ironi niv collections generally correspond in the 

 main with the Færoese examples which are to be found in Lyng- 

 bye's Herbarium, l)nt they do not agree exactly with his figure 

 (I. c. tab. 33) which Kjell man qnotes under formå Lyngbyei Kjellm. 

 A t'ew examples, e. g. from Kollefjord, agree fairly well with Are- 

 schoug's Exsicc. , No. 64; others again are small and somewhat 

 suggest Kutzing'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 speeies is rather widely distributed along the eoasts of the 

 Færoes as it has been found in the following loealities: — Ost.: Molen ! , 

 Ejde H. S.;!), Næs Lyngb., H. S.); 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 oeeurring along the 

 eoasts of the Færoes, but no specimens of it are to be found in his 

 herbarium. Agardh 4. 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 Færoes it is xevx 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. 102 (126); Hut- 

 chinsia nigrescens Lyngb., Hydrophyt., p. 109. 



21* 



