761 



the bottom on the coasts of the Færoes is most often of soft 

 material, either sand or mud, and therefore destitute of piants. I 

 have however happened to meet with sonie small stretches covered 

 with plant-life. In Nolsofjord, for instance, outside Gliversnæs, at a 

 depth of 20 — 25 fathoms, I found a somewhat luxuriant vegetation 

 on larger or smaller stones, quantities of which canie up in the 

 dredge together with the algæ. 



The following species were found here: Delesseria siniwsa, D. san- 

 giiinea, CallophijUis laciniata, Rhodophyllis dichotoma, Euthora cristata 

 and Ptilota phimosa. Among the algæ were several Brijozoa which 

 had a more or less reddish hue from the RIwdochorton inembra- 

 naceum and the Rh. penicilliforme. Small crusts of species of Litho- 

 thamnion also grew on the stones, but only imperfectly developed. 

 The calcareous shells scattered among the stones had likewise a 

 reddish hue from the Conchocelis rosea and the Hyella cæspitosa 

 var. nitida, and some had become green from the Ostreobium Qiie- 

 ketti. As may be seen from this enumeration, this vegetation was 

 rather rich in species. 



It must be pointed out further, that all the algæ, with the 

 exception of the Ostreobium, were red, which agrees with the theory 

 of Engelmann, (ep. Gaidukow, 35). If Nadson is right, as seems 

 likely, in declaring that Conchocelis rosea — Ostreobium Queketti, all 

 the algæ found here may justly be cailed red algæ, as it seems 

 quite natural, that an alga which takes on, now a red, now a green 

 hue, according to the surrounding conditions, may also be found 

 in both forms at one time. 



Below^ 25 fathoms the individuals became very weak and were 

 overgrown by Bryozoa, and at a depth of 30 fathoms no algæ were 

 found. In Klaksvig, I have found Phyllophora Brodiæi on pebbles, 

 at a depth of about 20 fathoms. 



Moreover it must not be forgotten that all these algæ are com- 

 mon North Atlantic sublittoral species, growing especially in the 

 deeper parts of this region. No species characteristic for these depths 

 have been found either here or anywhere else. 



This association agrees with the sublittoral F/orWeæ-formation 

 found by Rosen vinge in Greenland (p. 222); floristically however 

 it differs somewhat. 



