760 



Near Gliversnaes, at a depth of about 10 — 15 fathoms, on a bot- 

 tom of pebbles and shells, a ^'egetation was found consisting of the 

 following algai: Antithamnion Plumula, Polijides rotiindus, Porphijra 

 miniata, Phyllophora Brodicvi, Calloplujllis laciniata, JJlva Lactuca, 

 Ectocarpiis Hincksice, Desniarestia uiridis, Laminaria saccharina^ and 

 the following crust-like algae: Lithoderma fatiscens, Peyssonnelia Dii- 

 biji, and less abundantly, Lithothamuion Iceue and Phymatolitlion lievi- 

 gatiini. The calcareous shells found among the pebbles had here, as 

 everywhere in the subliltoral region, a green or reddish hue from 

 the Conchocelis rosea, Gomontia pohjrhiza, Ostreobiiim Queketti and 

 Hyella. At Hviden?es, at a depth of about 10 fathoms, a similar 

 vegetation was found; yet the following algse: Odonthalia denUda, 

 Delesseria siimosa, Derbesia marina, Polysiphonia Brodioii and P. elon- 

 gata occurred in addition to the majority of the above-mentioned 

 algse from Gliversnses. This vegetation seems to correspond with 

 Kjellman's and Rosenvinge's descriptions except for some flori- 

 stical differences. The characteristic alga is however not so com- 

 mon on the coasts of the Faeroes as in Greenland and in the 

 »Murman Sea«. 



In connection with this, we must also point out that the Faeroes 

 seem to be perfectly destitute of the Lithothamnion-formaiion else- 

 where very common in the northern seas. With the exception 

 of Phymatolithon polymorphiim, which is very common on rocks 

 from the lowest water mark downward into the sublittoral re- 

 gion, the Lithothamnion-s]}ec\es are relatively few on the Faeroes. 

 The specimens found there are, according to what Mr. Foslie 

 kindly tells me, often stunted and badly developed. Most likely 

 the reason is, that the bottom is in deep water most often of 

 sand or mud, and therefore not suitable to the requirements of 

 these algae. 



Simmons, who once dredged with me at Gliversnaes, gives a 

 description of some of the algae from that place (p. 257) yet with- 

 out drawing any final conclusion as to the character of this vege- 

 tation. 



The sublittoral Floridece-Formation. 



The brown algae which grow deepest e. g. Laminaria hyper- 

 borea and Desniarestia aculeata, already become scarce at 15 fa- 

 thoms, and most likely disappear at 20 fathoms. At this depth 

 hardly anything but Floridece are found. At the curve of 20 fathoms 



