146 M. Foslie. 



Syn. Uroapora penicilliformis Kjellm. N. Ish. Algfl. p. 386; ex 



parte. 



A litoral alga, growing on stones, rocks, wood-work, 

 or epiphytic on other algse, as Fucacece and Halosaccion ra- 

 mentaceum. It appears gregarious and not seldom in great 

 masses, so as to determine essentially the character of the 

 vegetation, for inst. at Svserholt (Vestersiden), Kjollefjord 

 and Finkongkjeilen, and occurs both on open and sheltered 

 coasts. Specimens furnished with zoospores have been col- 

 lected in June, July and August. 



Distribution: Common and abundant in most places 

 along the whole coast, but somewhat local. 



Fam. Chroolepediacese (Rabenh.) Borzi. 



Studi alg. 1, p. 25; Kabenh. Fl. Eur. Alg. 3, p. 371; lim. mut. 



Gen. Pilinia Kiitz. 

 Phyc. gener. p. 273. 



Pilinia minor Hansg. 

 in lit. 



„Lager diinnhiiutig, oder fast krastenformig, gelbliehgrun, mehr 

 oder weniger ausgebreitet. Faden meist kurz und wenig verzweigt. We- 

 getative Zellen 3 bis 5 // breit, 1 bis 2 mal so lang, Endzellen abgerun- 

 det; in jeder Zelle ein wandstandiger, bandformiger Chlorophylltrager. 

 Gebt aucb in einen einzelligen Protococcus-artigen Entwickelungszustand 

 iiber". Tab. 2, fig. 17—22. 



The species occurs on rocks and wood-work at high- 

 water mark in exposed localities. It often appears gregari- 

 ous together with Lyngbya jadertina, and sometimes also to- 

 gether with Ulothrix flacca. 



Distribution: Found at Svaerholt and Vardo, rather 

 scarce. 



