376 



I said before I believe there are hardly any specially marked diffe- 

 rences between this species and the preceding 1 . 



This species occurs in the littoral zone, but most commonly 

 in shallow water and grows usually on stones and shells. I have 

 come across cystocarpic piants in April and November. Harveyella 

 mirabilis occurs on it as a parasite. 



Found at the following piaces: — Syd.: Tværaa (!), Vaagfjord (H. J.)~; 

 Kun 6 (H. J.). 



For Rhodomela sabfusca (3 racemosa Lyngb. see above under Rhodom. 

 lycopodioides. 



Under Rhodomela sabfusca Rostrup (1. c. p. 82; writes »Mr. Ran- 

 dropp sent us specimens of f. flaccida.* But the only specimen of this 

 form whieh is preserved in Dr. Rostrup's private collection does not 

 belong to this species, but is a well-developed specimen of Polysiphonia 

 eloagata. 



ODONTHALIA Lyngb. 



47. O. dentata (L.) Lyngb., Hydrophyt., p. 9; Kjellm. , N. I., 



p. 138 (105). 



This is a sublittoral species and is common both in the open 

 sea and in the interior of fjords. It grows on rocky and stony 

 bottoms as also epiphytic especially on Laminaria hyperborea. Gene- 

 rally it occurs dispersed, but it may also be found growing gre- 

 gariously in small patches. 



Cystocarp-bearing specimens were found in May and December; 

 tetrasporic in April, May and June. In the Arctic Sea Kjellman 

 found tetraspore-bearing specimens in August, and Ruprecht (Alg. 

 Och., p. 212) mentions having found similar specimens in June. 

 Some specimens collected in August in Altenfjord (Kjellman, 1. c. 

 p. 10(5) showed signs of cystocarps. This species seems thus to 

 grow much in the same way around the Færoes as in the Arctic 

 Sea. Along the English coasts it bears reproductive organs in the 

 winter months. In the Færoes vigorous young shoots occurred in 

 April, May and June. 



This species is very common along the Fa^roese coasts as already 

 mentioned by Lyngbye (1. c.): — »Ad insulas Færoenses copiose.« 

 It is recorded by Landt, 1. c. p. 231. 



1 Since writing the above Falkenberg has published his large Monograph on 

 the Hhodomelaceæ in whieli he (p. 593) reports /». virgata and li. lycopodioides 

 as synonymous with /{/?. subfusca, but piaces a? against this statement. 



