Contributi.on- T. 



105 



The present plant is litoral, living in rock-pools in the 

 upper part o£ the zone, and appears only on open coasts. 

 It bears zoosporangia in the middle of Jnly. 



r 



Distrlbution: Found at Mehavn, scarce, at Berlevaag, 

 local bnt abundant, and at Ekkero, scarce. 



, k 



\ 



L 



Dictyo sip hon hipp u reides (Lyngb.) Kutz, 



Tab. riiyc. 6, p. 19; ScytosiphonhippuroidesLyngb.Hydr.Ban.p, 63. 

 Descr. Dictyosiphon Mppnroides Arescli. Obs. Phyc. 3, p. 26. 



^ „ Kiitz. 1. c. t. 52. 



- „ Årescli. Alg. Scand. exsicc. No. 105, 320, 



Fig. 

 Exsicc. 



321. 



S^n. Dictyosiplion foeniculaceus a Aresch. Phyc. Scand. p. 147, 



This species is chiefly litoral, usually living in rock-pools 

 fastened to stones, or, more often, epiphytic on other algæ, 

 principally Chordaria flagelUformis and Fuci, sometimes also 

 Bhodymenia palmata and Halosaccion ramentaceum, Itoccurs 

 on open as well as sheltered coasts. Specimens bearing 

 zoosporangia have been tåken in June, Jnly and Aiignst. 



Distrilmtion: Common and abnndant almost everywhere, 



Dictyosiphon foeniculaceus (Huds.) Grev. 



AW Brit. p. 56; Confcrva foeniculacea Hiuh, FL Angl. p. 164. 



f. typica, . ■ 



Beser. Dictyosiplion foeniculaceus Arescli. 01>s. Pliyc. 3, p. 30, 



Exsicc. 



» 



j, Phjc. Scand. t. 7, 



Alg. Scnnd. exsicc. No. 103, 319, 



f. flaccida Aresch. 



Bot. Not. 1873, p. 137 

 Beser. DiciyoMidion foeniculaceus var. fiaccidus Arescli. Obs. Fliyc. 3, p. 31. 



Syn. Scy ■o3i[)lion focnisulaoeus Lyngb. Plydr. Dan. p. 63; ex parte. 

 Dictyosiplion focniculaceuR ^ Arescli. Pliyc. Scand. p. 148. 



The fonn flaccida is, in the Norwegian Polar Sea, a well 

 differentiated form. Its zoosporangia are generally larger 

 than by the typical fonn, their long axis attains sometimes 



^yen UO a, At Tromso occurs a very coarse form, rnost^ 



Tu 





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