Contribution. I. 1X9 



Distribution: Pretty common and plentiful along the 

 whole coast. 



Monostroma Blyttii (Aresch.) Wittr. 

 Monostr. p. 49; Ulva Blyttii Aresch. in Fr. Summ. Veg. p. 129. 

 Descr. Monostroma Blyttii Wittr. 1. c. 



„ „ Kleen, Nordl. Alg. p. 42. 



Fig. „ „ Kjellm. Spetsb. Thall. 2, t. 4, fig. 1—7. 



Exsicc. „ „ Aresch. Alg. Snand. exsicc. Nr. 423. 



„ „ Wittr. et Nordst. Alg. exaicc. Nr. 44. 



• Syn. Ulva rigida Sonimerf. Suppl. p. 185. 



The species is chiefly litoral, living in rock-pools and 

 fastened to shells (31ytilus) or other algse, as Corallina of- 

 ficinalis and Halosaccion ramentaceum, on open as well as 

 sheltered coasts. Zoospore-bearing specimens have been col- 

 lected in July and August. 



Distribution: Common and abundant almost everywhere. 



Gen. Ulva (L.) Wittr. 

 Monostr. p. 9; L. Syst. Nat. Ed. 10, p. 1346. 



Ulva lactuca L. 



Spec. Plant. 2, p. 1163. 

 Deser. Ulva lactuca Born, et Thur. Etud. Phycol. p. 5. 

 Fig. „ „ „ „ t. 2-3. 



Exsicc. j, „ Wittr. et Nordst. Alg. exsicc. Nr. 141. 



Syn. Ulva latissima Kleen, Nordl. Alg. p. 40. 



Litoral, occurring on rocks near low-vater mark. I 

 have collected zoospore-bearing specimens in the beginning 

 of August. 



Distribution: Found only at Pasvig in Sydvaranger, 

 rare. 



Gen. Enteromorpha (Link) Harv. 

 Man. p. 173; Link. Epist. p. 5; 3 parte, 



