KAAKK MLNSTKK SI KØM M.-N. Kl 



5. S V a r 1 1 i C r 11 in Vcstrt- (i a 11 s dal is a small lake situated in 

 birchwoofl near the ti<c line l'ciiicd/ ) iii's. yliigiist ^. nji'S. 'I'he phyto 

 plankton was very rich, Ccniliiiiii liinindiiiclla prevalent, but Staurastrnui 

 parndoxiiiii, Spondylosiuiii plaiiimi and Sphœrocysfis Schroeteri were abun- 

 dant. - Mallomonas acaroidcs, 'rahclldiin fencstrata, TabeUaria flocculosa, 

 a ibur-rayed form of Staiinistniin (iiKitiiiiiin, Sfatiras/nini hinattwi var. 

 plain toniciiiii, CosiiKiriiiiii coiitractnui, Xaiitliidiiiin autilopicinn, and Oocyslis 

 crassa were moix- or less common. 



6. G o 1 a a V a n (I e t is a mountain lake West of G u d br andsd al e n 

 which covers an area of about 2,75 square kilometres. It is situated at an altitude 

 of about 900 m's. The bottom and the shores of the lake are mainly 

 stones and gravel. The lake is not very deep, the maximum depth being- 

 only about 36 m's. One sample from f/ir surface July 22. i8cj6. — The 

 phytoplankton somewhat poor. The chief constituents were Sphœrocystis 

 Schroeteri, Cyclotella couita, Botryococcus Braunii, and Spondylosium planum. 

 — The zooplankton was comparatively rich, composed of Holopcdium gibbc- 

 nini, Daplinia galcata, Bosinina obtusirostris var. alpina, Bythotrephes longi- 

 niainis var. borealis, Heterpcope salir//s, Diaptonuis laticcps and Notliolca 

 loiigispiua. 



7. Fæ for van det is an other Alpine or rather sub-Alpine lake not 

 far from the preceding. It has considerable depths, the greatest being 53 m's. 

 The surroundings are chietl^' mountain forests, partially they are peaty. 

 The elevation above the level of the sea is about 930 m's. Two samples 

 were examined. 



/. July /c?. i8c)<S. Vertical /9. ;//'k. In this collection the phyto- 

 plankton was poor, mainly composed of the Diatoms Cyclotella cointa and 

 Euuofia lunaris together with a few scattered specimens of Cliroococcus 

 liuuieticus. 



2. July 2j;. uS()(). The surface. Plankton of no considerable im- 

 portance. Sphœrocystis Schroeteri prevalent with Euuofia hiuaris in some 

 quantity. 



8. S e 1 s V a n d e t is a small lake situated some 400 m's above the 

 level of the sea in the district Gudbrandsdalen. The drainage-area is small, 

 and the water for a greater part derived from springs. The lake is very 

 shallow throughout. The average depth is only 3 m's, the deepest part 

 being only some 5 m's. The bottom is soft and mouldy. There is a \-ery 

 rich vegetation of water plants, mainly Potauiogeton. The surroundings are 

 chietly pine forests, partially also cultivated areas. 



Two samples were examined. 



/. July 2Ç). i8ç)6. ]\'rtical 4, y m's. The phytoplankton was extra- 

 ordinarily rich, predominant being Ceratiuiii hiruudiuella which together 

 with Statirastruui gracile occurred in very great quantities. Of other Algæ 

 only Pediastruiu Boryauuui and Asteiioiwlla gracilliiua were fairly common. 



