-fi: 





ontribiition. L 



27 



narrow one, the above qnoted f. angiistata Lyngb. This 

 form is analogons to the before mentioned narrow form of 

 Odonthalia dentata and BliodophylUs dichotoma. It is on just 

 the same or corresponding localities as these, that Euthora 

 cristata cbeafly assiimes the ioxm angustata, Also of this form 

 I have seen almost thread narrow specimens with nearly li- 

 near branches, much differing from the typical one. According 

 to my experience they pass, however, so gradually into each 

 other, that no limit can be drawn between them. 



The species in question is nsually sublitoral, growingon 

 stones, shellsof Balanidæ, or more frepuently attached to other 

 ^^gæ, as Laminaria hyperhorea^ Ftiloia and Lithothamnia^ 

 ^n a depth of 2 — 15 fathoms. Sometimes it occurs within 

 the litoral zone, in rock-pools at low-water mark. It prefers 

 open shore and appears scattered. The lengthrarely exceeds 

 4: cm. At E as t-Finra arken it has been tåken with sporocarps 

 m July and August; at West-Finmarken in May to Septem- 

 ber; in Tromso amt in July and August; at Nordland during 

 aU the summer, according to K 1 e e n, and I have my seif 

 lound it with such organs in September, Octoher and January. 

 Tetrasporiferous specimens have been collected at East-Fin- 

 marken in August; at West-Finmarken in September; and at 

 ■Nordland all the summer according to Kle en. 



I 



Disfrihution : Commonly spread along the whole coast, 

 and almost entering the inner end of the great bays. 



Gen. Rhodymenia (Grev.) J. G. Ag. 



Alg. Liebm. p. 15; Grev. Alg. Brit. p. 84; char. mut 



Rhodymenia palmata (L.) Grev. 



1. c. p. 93; Fiicus pahnatus L. Spee. Pl. 2, p. 1162. 



f. typica, 



a nuda Kjellm. 



fr, Isli, Al^fl. p. 188, 



