100 L. KOLltERUP ROSEXVINGE. 



f. botrytoides Foslie (1905) p. 26. 



L. botrytoides Fosl. in K. Rosenviage (1898 I) p. 10. 



L. delapsnm f. conghitinata Fosl. (1895) p. 50 pi. 14 fig. 4. 



f. subsimplex Foslie (1905) p. 27. 



L. varians Fosl. in K. Rosenvinge (1898 I) p. 11. 



There are some few specimens belonging to f. typica, some others 

 agreeing with f. subsimplex and a single specimen belonging to f. bo- 

 trytoides. The specimens referred to f. subsimplex are mostly large 

 flat crusts with low rounded processes, with very few and feebly 

 developed or even without such processes. In the latter case I 

 should perhaps not have dared to refer the plant to this species, 

 had not Foslie referred to L. glaciale a similar crust from East 

 Greenland which he had formerly referred to L. varians. The great 

 variability of the processes and the gradual transition from forms 

 with well-developed branches to those with even crusts make me 

 have no doubt as to the correctness of this determination. The 

 species has been dredged at a depth between 19 and 47 meters and 

 in another place at a depth of 38 meters or deeper. 



Loc. Entrance to the harbour; along Vestre Havnenæs; off Baadskæret. 



3. L. foecundum Kjellm. 



Kjellman (1883) p. 1.31; К. Rosenvinge (1898 I) p. 12, Foslie (1905) p. 21. 



The collection contains a number of specimens which in my 

 opinion must be referred to this species. They agree in habit and 

 as to the size and form of conceptacles of sporangia with the de- 

 scriptions and the formerly collected Greenlandic specimens of this 

 species. The conceptacles, however, were most often empty, and in 

 a single case, when they still contained sporangia, these were two- 

 parted, while the species, according to Kjellman and Foslie, has 

 ordinarily four-parted sporangia. Foslie has also sometimes found 

 the sporangia two-parted, but he supposes that the}' were not fully 

 developed. The sporangia observed by me were at all events well 

 developed as to the size, for they measured 175 — 200 /u in length 

 and 77 — 120// in breath. The conceptacles of sporangia were 400 — 

 500« in diameter. A crust with antheridial conceptacles, ca. 400 /i 

 in diameter, was also met with. — The plants were found growing 

 partly and principally on barnacle-shells, partly on stones, most 

 often in company with Lithothamnion lœve. — Collected at a depth 

 of 38 meters. 



Loc. Along Koldewey Island; entrance to the harbour; along Vestre 

 Havnenæs; off the Baadskær. 



4. L. læve (Strömf.) Foslie. 



Foslie (1898) p. 7; K. Rosenvinge (1898 I) p. 14; Jonsson (1904) p. 6; Foslie 

 (1905) p. 16. 



