Contribution. I. 133 



mis in rock-pools in the upper part of the named zone ; f. 

 Sonderi in the lowermost part of the litoral and uppermost 

 part of the sublitoral regions, descending- to a depth of a- 

 bout 4 fathoms; and f. hystrix sublitoral, on a depth of 2 — 

 8 fathoms. Specimens with zoospores have been collected in 

 June, but sparingly. 



Distribution: Common and abundant everywhere (i.ty- 

 pica). The form pulvinata only along the open coast, at most 

 places plentiful; f. penicilliformis only found at Berlevaag, 

 scarce; f. Sonderi at Mehavn, local but pretty plentiful; and 

 f. hystrix at Kjollefjord, rare. (The latter also found at 

 "West-Finmarkeu in rather great numbers). 



Spongomorpha intermedia Fosl. 



in "Wittr. et Nordst. Alg. exsicc. Nr. 615. 

 Descr. Spongomorpha intemieijia Fosl. 1. c. 



This species approaches on the one side to S. arcta (f. 

 pulvinata) and on the other side to S. atrovirens. Cp. Wittr. 

 et Nordst. Alg. exsicc. Nr. 616. But it is distinguished 

 from both by essential characteristics. 



The plant lives in rock-pools in the upper part of the 

 litoral region at exposed places. I do not know when it 

 develops its reproductive organs. Specimens collected in 

 July were sterile. 



Distribution: Found at Kiberg and Pasvig, local but 

 pretty plentiful. 



Spongomorpha lanosa (Roth) Ktitz. 



Spec. Alg. p. 420; Conferva lanosa Roth, Cat. Bot. 3, p. 291. 



f. tijpica. 

 Descr. Cladophora lanosa Harv. Phyc. Brit. t. 6. 

 Fig. Spongomorpha lanosa Kiitz. Tab. Phye. 4, t. 83. 

 „ villosa Kiitz. 1. c. t. 83. 



„ senescens Kiitz. 1. c. t. 84. 



Cladophora lanosa Harv. Phyc. Brit. t. 6. 

 JSxsicc. Conferva lanosa Aresch, Alg. Scand. exsicc, Nr, 181 et 2£8, 



