46 M. Foslie. 



whole coast; at some places, as Berlevaag and Syltefjord, 

 abundant but local. 



Antithamnion Pylaissei (Mont.) Farl. 

 New. Engl. Alg. p. 123; Callithamniou Pylaissei Mont. PL Cell. No. 

 11, sec. J. G. Ag. Epicr. p. 22. 



f. typica. 

 Descr. Oallithamuion Pylaissei Harv. Ner. Bor. Am. 2, p. 239. 



„ (Antithamnion) Pylaissei Farl. New. Engl. Alg. p. 123. 



Fig. Callithamnion Pylaissei Harv. Ner. Bor. Am. 2, t. 36 B. 

 „ „ Kiitz. Tab. Phyc. 11, t. 90. 



f. norvegica Kjellm. 



N. Ish. Algfl. p. 225. 

 Descr. Antithamnion Pylaissei f. norvegica Kjellm. 1. c. <■ 



Fig. „ „ „ „ „ t. 16, fig. 1. 



The most common form of this species grows generally 

 scattered, often with isolated, small individuals, 0.5 — 1 cm. 

 in height, as to the shape and position of the branches most 

 nearly agreeing with fig. 3 — 4 on pi. 36 B in Harv. Ner. 

 Bor. Am. However the cells of the main axis and of the long 

 branches are shorter than in American specimens according 

 to Harvey. The length does not exceed 4 times the dia- 

 meter, generally 2 — 3. I have seldom seen specimens with 

 as patent and rather blunt branches as the form figured by 

 Kjellm an 1. c. On the iron buoy at Berlevaag mentioned 

 under A. floccosum, I met with rather luxuriant individuals 

 reaching a height of 5 cm. They resemble H a r v e y's fig. 

 1 1. c, or sometimes more densely branched, and almost 

 fully coincide with American specimens determined by F a r- 

 1 o w, only smaller and a little darker. The cells of the main 

 axis and partly of the long branches are up to 6 times lon- 

 ger than the diameter. These specimens I have referred to 

 the typical form, and most af the above mentioned smaller 

 ones with short cells and somewhat patent branches I have 

 referred to f. norvegica. The latter I think to be only a 



