6 M. Fo.slio. 



in sheltered places. Specimens coUected in June, July and 

 the earlier half of August were sterile. 



Distribution : Pretty common along the whole coast 

 but mostly in small numhers. 



i 





Gen. Lithothamnion Phil. 



Wiegm. Arch. 1, p. 387. 



Lithothamnion soriferum Kjellm. 



N. Ish. Algfl. p. 117. 

 Descr, Lithothamnion soriferum Kjellm 1. c. 

 Fig, n » Kjellm. L c. t. 1. 



r 



This species approaches on one side to L. alcicorne and 

 on the other side it not seldom assumes a form, in general 

 appearance very much like L. norvegicum. 



The plant is sublitoral and occurs usually on a depth 

 of 10 — 15 fathomSj on open as well as sheltered coasts, but 

 it appears to prefer protected places aud it enters to the 

 end of the deeper baya. It grows on sandy and shingly 

 or clay-mingled bottom. I have tåken specimens with tetra- 

 spores in June and August. 



Distribution, It seems to be pretty common everywhe- 

 re, and at some places, for inst. Lebesby, abundant. 1 have 

 tåken it at Lebesby, KjoUefjord, Mehavn, Vardo and at 

 Kirkenæs in Sydvaranger. 



b - _ X _ 



Lithothamnion norvegicum Aresch. (Kjellm.) 



N. Ish. Algil. p. Vi% ; Lithothamnion calcareum var. norvegicum 

 Aresch. Obs. Phyc. 3, p. 4. 



Descr. Lithothamnion calcareum var. norvegicum Aresch. 1. c. p. 4—5. 

 Fig, „ norvegicum Kjellm. N. Ish. Algfl. t. 5, fig. 9—10. 



r. 



I have only met with some few barren specimens of 

 this species, As mentioned before, it seems to be nearly 

 related to the preceding one, and I should be inclined to 



^^Qiisider it a form of tbat speoies, Howeyer, it is ^ plawt 



I, 



■^ 



