— 28G — 



observations made by Miss A. Gleve^) concerning the phytoplankton 

 of lakes in Lule Lappmark it will be seen, that the plant-orgahisms 

 are much the same in Lomnaessjon as in the forest lakes in Lapp- 

 mark, viz. Dinohryon, Tahellaria fenestrata and flocculosa and 

 Asterionella formosa. The Myxophycece and Peridiniacece are entirely 

 absent, and the Chlorophycece rare; the occurrence in Lomnoessjon 

 of some species of the latter, viz. Sphcerocystis, Botryococcus (and 

 also the brown alga Stichngloea) are without doubt due to the small 

 mountain-stream, Harrena, which runs from the lake Harsjon to 

 Lonmasssjon and carries with it some plankton specimens from the 

 former. 



In August 1899 Dinobryon was absent, and the plankton con- 

 sisted of a few diatoms and Chlorophycece only; it seems rather 

 odd that the plant-organisms were so scarce, while the animals 

 were very numerous, and I must admit, that I am not prepared 

 to give an exhaustive explanation of this fact. 



') Gleve, Astrid: Notes on the plankton of some lakes in Lule Lappmark, 

 Sweden. — Ofv. af k. Vetensk. Akad. Forhandl. 1899, No. 8, pp. 825-835. 

 Stockholm. 



