Contribution. 1. 



175 



Plate 3. 



Vlothrix flacca. 

 Fig. 1. Part of a vegetative thread with very short cella 



in longitudinal direction of the frond. 

 2 — 3, Parts of a zoospore-bearing thread. ' 



Urococcus loslieaniis. 



310 



'A- 



/i- 



Fig. 4—5. Two cells' with annnlated, gelatinens stalk. ^'•Vx. 

 « 6. A cell which has divided itself into two daughter- 



cells; h, small drops of Håmatochrom. 



Bactylococms {?) liioralis. 



600 



/i. 



Fig. 7. A vegetative cell Lefore, during and after the di- 



vision. 



900 



'A- 



DackjlococciiS marinus. 

 Fig. 8. Vegetative cells of the plant. 



\^- 



600 



/i- 



■ \ \ 



Fleiirococciis marinus i, typica. 

 Fig. 9. A young cell, then a three- and a four-celled fami- 



ly- 



600 



Tleiirococcus marinus f. major. 



Fig, 10. A vegetative cell of the plant. 



600 



/i- 



Frotococciis marinus f. Foslicana, 



Fig. IL A vegetative cell of the plant. 



GOO 



A- 



Protococcus ovalis. 



Fig. 12. Vegetative cells of the plant. 



600 



A. 



Folycystis litoralis. 



Fig. 13, Two families of the plant. 



600 



A 



Sarcina litoralis (?) f. norvcgica. 



Fig, 14. A tuherous family of the plant. 



600 



A. 



y 



11 



