— 237 — 



200 M. over the sea. All the tarns are small and shallow, the shores 

 are partly stony and partly peaty. The collections are made in 

 the last part of August and the beginning of September, conse- 

 quently at the time in which the water ordinarily gets at its highest 

 temperature; the temperature observed was 10° — 12° C. 



In the accompanying table I have grouped together the or- 

 ganisms from the 5 tarns and given the frequency of their occur- 

 rence in the customary way. 



Locality < 



I 



1 a rn 

 near 

 Velbestad 





Tarns in 

 Kirkebörejn 





Height over the sea (in Meter) 



200 



200 



300 



300 



320 



Date (1903) 



24. VIII. 



3. IX. 



3. IX. 



3. IX. 



24. VIII. 



Myœophyceae. 













Polycvstis pallida Lemm (?) 



IT 











( lb rnopnppns mi 



IT 





IT 







Aphanothece sp 



IT 





IT 







Chlorophyceae. 













Hvalotheca dissiliens (Dillw.) Bréb 



IT 



IT 



r 



r 



rr 



Sphaerozosma vertebratum (Bréb.) Ralfs 











ri- 



Staurastrum jaculiferura West 





rr 









Xanthidium antilopaeum (Breb.) Kutz. .. 



r 











Pediastrum Boryanum (Turp.) Menegh. 



r 







rr 





Pandorina morum (Müll.) Bory 



IT 











Flagellatae. 













Uroglena volvox Ehrbg 



IT 











Dinobrvon cylindricum Imh 





IT 









— sociale Ehrbg 



C 







+ 





Peridinium umbonatum Stein 



ri- 











Willei Huitf.-Kaas 



ce 



CC 



r 



r 



ce 



Bacillariaceae. 













Fragilaria capucina Desm 



cc 











Synedra ulna (Nitzsch) Ehrbg 



+ 











Surirella biseriata Bréb 



+ 



rr 





rr 



rr 



Tabellaria fenestrata (Lyngb.) Kiitz 



+ 



rr 









flocculosa (Roth) Kiitz 



+ 



r 





r 



rr 



Melosira distans Kiitz., v. nivalis 



r 











Animals. 













Copepods and nauplia 





+ 



r 



r 



+ 



Bosminae 





r 



CC 





cc 



Rotatoria 



cc 



C 



+ 



cc 



cc 



Difflugia sp 



r 











