Contribution. I. ]^3 



of Rhisoclonium tortuosum. A specimen communicated to me 

 by Hauck, in habit greatly resembles Conferva tortuosa 

 Wyatt, Alg. Damn. Nr. 190, but, as I have stated before, 

 the latter is a RMzoclonium, probably a form of Rh. tortuo- 

 sum. I have seen specimens from the southern Norway 

 which almost fully coincide with Adriatic ones, and also 

 transitions between the named forms. 



The present species, on the coast of Finmarken, has 

 only been found in sheltered localities, in the inner part of 

 deep bays. Specimens collected in the beginning of July 

 were sterile. 



Distribution: Found at Kirkenses in Sydvaranger, lo- 

 cal but pretty plentiful. 



Fam. TTlothrichacese (Rabenh.) 



Jb'lor. Eur. Alg. 3, p. 360; excl. Schizogonium, Hormidium. 



Gen. Ulothrix Ktitz. 

 Alg. Dec. Nr. 144; sec. Spec. Alg. p. 345. 



Ulothrix implexa Ktitz. 

 Spec. Alg. p. 349. 

 Descr. Ulothrix implexa Hauck, Meeresalg. p. 440. 

 Fig. „ n fig. 193. 



j, „ .Ktitz. Tab. Phyc. 2, t. 94. 



„ submarina Kiitz. 1. c. 

 Exsicc. „ implexa Hauck et Richt. Phyc. univ. Nr. 72. 



This plant is at first fastened to other algae, but af- 

 terwards is getting loose, forming tangled masses. I met 

 with it fastened to Dictyosiphon hippuroides and Cladophora 

 gracilis, or loosely entangled with the latter and Mhizoclo- 

 nium rigidum, or jointly with other algae. It is chiefly li- 

 toral and is frequently met with in rock -pools, on open as 

 well as sheltered coasts. Once I found it in the uppermost 



