188 KAARE MÜNSTER STRØM. 



277. Trochiscia paucispinosa. W. West. 

 In quantity in a few samples. 



278. Trochiscia reticularis. (Reinsch.) Han sg. 

 Reinsch: Acanthococcus Taf. xi. Fig. 12. G. S. West: Brit. 



Freshw. Algæ. p. 203. Fig. 82 K. 

 In a few samples. 



Family Chlorobotrydaceæ. 

 Genus Chlorobotrys. Bohlin 1901. 



279. Chlorobotrys regularis. (W. West) Bohl. 

 Common amongst Sphagnum, 



Family Autosporaceæ. 

 Genus Oocystis. Nägeli 1845. 



280. Oocystis solitaria. Wittr. 



Common, and often in quantity. PI. V, Fig. 8. (forma.) 



281. Oocystis Naegelii. A. Braun. 

 In one or two samples. 



282. Oocystis parva. W. & G. S. West. 

 Printz : Ubers. Oocyst. Taf. iv. Fig. 24—30. 

 Scarce. 



Genus Nephrocytium. Nägeli 1849. 



283. Nephrocytium Agardhianum. Näg. 

 Rare in the plankton. 



Genus Eremosphœra. De Bary 1858. 



284. Eremosphœra viridis. De Bary. 

 Common, but never in great abundance. 



Genus Chodatella. Lemmeimann 1898. 



285. Chodatella sp. 



Only a few specimens were observed. 



