IS 



C A K (i LINE LEE G A A B I). 



Diatoma tenue Ag. 



(Fig. 17 b.) 



V. H. S. p. 160, pi. 50, f. 1 — 15, 17—22. 

 1901 Le vantler. 



This linear diatoni from the brackish water was flomïshing in the upper 

 nutritive layers of station P 41. The greatest nutnber was 47000 cells pr. litre 

 (5 mètres). At stations F 50, F 61 and F 23 only a few spécimens occurred, 

 while this species was missing at stations F 30 and F 74. 



The length of the cells varied from 53 u to 64 <i. 



Melosira distans Krrz. 

 V. H. 8. p. 199, pi. 86, f. 17—35 

 Presh water. 



Melosira gramdata (Ehe.) Ralfs. 



V. H. 8. p. 200, pi. 87, f. 7 — 27. 

 1910 Meunier, p. 273, pi. 30, f. 28. 



Fresh water. 



Fig. 17. L°°9. 

 ö i 



a. Nitzschia Sigma /'. ehngata. 



b. Diatoma tenue. 



c. Nitzsehia sp. 



d. Rhoicosphenia curvata. 



e. Stauroneis Heufleri. 



Tom. XLYllI, 



