58 M. FOSLIE. [1905 



the specimen, mentioned above, from Eastport, Maine. The form 

 diver gens is the most frequent one, and is found almost in all 

 areas where the species is distributed. The form flabellata, on 

 the contrary, is of rare occurrence. A few specimens have been 

 taken at Proven on the West coast of Greenland and at Hekla- 

 havn on the East coast. A specimen from Kjelmo in Sydvaranger 

 (Norway) shows in part flabellate branches and perhaps belongs 

 to f. flabellata, but it is rather coarse and in part also resembling 

 the coarse form, above mentioned, approaching L. glaciale. It is 

 partly covered with Phgmatolithon investiens. Another, and a 

 young, specimen from Bodo with short and compressed branches 

 recalls young f. flabellata, but the crust is rather coarse, and, 

 therefore, the specimen is likely to represent a form of L. gla- 

 ciale. At Korsnes i Altenfjord I have collected specimens freely 

 developed at the bottom and likely referable to f. flabellata. They 

 are sterile, in habit almost coinciding with typical L. soriferum f. 

 alcicornis, but occurred together with fructiferous specimens of 

 L. topluforme f. diver gens. 



Area: 1 ) From the north-eastern boundary as far as Tromso (!), 

 and Nordland (Kleen)? Iceland (Jonsson!) 2 ) ; Scotland: Port 

 Bannatyne (Holmes, Mrs. Robertson!)? 3 ) Atlantic coast of 

 North America: Eastport, Me. (Lyman, Farlow!) 4 ), Bay of 

 Founday in Digby county, Nova Scotia (Ruggles, Mack ay!) 4 ); 

 West Greenland : Proven, Sukkertoppen, Unartok Fjord, Juliane- 

 haab (Petersen, Ryberg, Rosenvinge!); East Greenland: 

 Heklahavn (Hartz, Rosenvinge!); the White Sea (Gobi!)? 4 ) 



(L. fruticulosom 1. c), but it is likely to represent L. topliiforme f. sphct'- 

 rica, although the branches are shorter and more coalescing than usual in 

 this form. The ends of some of the branches are a little worn by friction. 



1 ) In Syll. Alg. IV (1905), p. 1740, De Toni records this species „in cal- 

 carea Leith (Unger)." However, the specimen described by U n g e r 1. c. 

 is from Greenland, and he does not mention the alga as occurring in the 

 ,,Leithakalk". 



2 ) Specimens bearing bisporic sporangia are known from the following places : 

 Arnarnes (no. 219), Vattarnes (no. 412), Hesteyrefjord, and Hvalfjord. From 

 the latter place is in hand a coarse form resembling the above mentioned 

 one of f. sphcerica, and in part probably belonging to L. glaciale. 



3 ) Cp. above under remarks on f. sptioerica. 



4 ) Cp. above under remarks on the geographical distribution of the species. 



