3cS8 



rare in sheltered. Lyng by e refers this species to C. ciliatum, and in 

 his herbarium there are specimens of it from Thorshavn and Andefjord. 

 Though he did not gather true C. ciliatum in the Færoes, yet his figure 

 tab. 10) is undoubtedly this species, so it must have been drawn from 

 the specimens of C. ciliatum from the Mediterranean which are also to 

 be found in his herbarium. 



This species, which was first reported from the Færoes by Lyng- 

 bye, is ver)' common there. 



60. C. rubrum (Huds.) Ag. J. Ag., Spec. alg. II, p. 127 and III, 

 p. 100; Kjellm., N. I., p. 214 (170); Foslie, The Norwegian forms of 

 Ceramium, p. 14. 



f. genuina Kjellm. 



f. deenrrens .1. Ag. 



f. prolifera J. Ag. 



subf. secundata (Lyngb.). Ceramium secundatum Lyngb., 



Hydrophyt., p. 119. 



subf. prolifera (Lyngb.). 



f. corijmbifera (Bonnem.) J. Ag. Foslie, 1. c. p. 15, tab. 3, fig. 6. 



f. fasciculata (Bonnem.) J Ag. Foslie, 1. c. p. 15, tab. 3, figs. 2 — 3. 



Besides these, there were a few specimens which may possibly 

 be referred to f. tenuis (Ag.) and f. pedicellata Duby. 



Ceramium rubrum is an extremely variable species, and of its 

 numerous forms I think I have been able to distinguish the above- 

 mentioned. Of these, formå deenrrens seems to be the most common; 

 formå genuina is more rare. The characteristic subforma secundata 

 (Lyngb.), of which there is an excellent drawing in Lyngby es 

 Hydrophyt., tab. 37, A, is fairly common in the CoraZZma-belt. 



Along the coasts of the Færoes this species grows both in 

 the littoral zone near low-water mark and in rock-pools, and in 

 the sublittoral, and it occurs on fairly exposed coasts as well as 

 shellered, perhaps more commonly on the latter. Usually it grows 

 on rocky and stony bottoms, but it is also frequently found epiphytic 

 on Fucus, Ascophyllum, Himanthalia, Laminaria and other algæ. 



Tetraspore-bearing piants were found from April to November 



and cyslocarpic from May to July, which agrees very well with 



what Kleen (l. c. p. 20) says is the case in Nordland. 



Tliis is an extremely common species of the Færoese coasts. Strangely 

 enough, as pointed out by Rostrup, p. 84, Lyngbye does not record 

 the main species from the Færoes; but there are several specimens of it 

 in his herbarium. Thus, Lyngbye's specimens of Ceramium diaphanum 

 Hydrophyt. p. 119), of which there are hvo in his herbarium, one from 

 Thorshavn and one from Eide, are forms of the main species; the 



