ÖFVERSIGT AP K. VETBNSK.-AKAD. FÖRHANDLINGAR 1899, N:0 8. 827 



Entomostracans: 



Bosmina longirostris (0. F. Müller). 

 » ohtusirostris G. 0. SARS. 



Diaptomus gt^acüoides LiLLJEBORG. 



Cyclops ahyssorum, junior, G. 0. SARS. 

 » scutifer G. 0. Sars. 

 » leuckartii CLAUS. 

 » aitlianoides G. 0. Sars. 

 Rotatorians: 



Gastroschiza flexilis JÄGERSKIÖLD, r. ') 



Notholca longispina Kellicott + . 



Anurea cochlearis GosSE, r. 

 Diatoms: 



Asterionella formosa v. suhtilis GrüN., V. H., PI. LI f. 21, r. 



Tabellaria fenestrata (Lyngb.) Kütz. + . 

 » flocculosa (Roth.) Kütz. + . 



Melosira [crenulata var?) tenuissbna Grun., V. H., PI. 

 LXXXVIII f. 11, r. 



The Melosira-^ovm occuring in this and some of the follow- 

 ing gatherings coraes by size and nuinber of points nearest 

 to M. tenuissima, Grun., which is quoted in Van Heurck's 

 Synopsis as a variety of M. crenulata. The length of the 

 cellules varies between 0,005 and 0,01 mm., the breadth between 

 0,004 and 0,008 mm., and the number of points is 18 in 0,01 

 mm. The broadest specimens sometimes present the characters 

 of M. crenulata^ but in most cases the bord-folds are not dis- 

 tinct and then the form is more like M. granulata. Thus it 

 may be doubted, whether M. tenuissima Grun. is duely to be 

 considei-ed a variety of M. crenulata. 



Solitary littoral diatoms found in this and .several other 

 gatherings have certainly been carried out into the lake by 

 streams and are omitted as not belonging to the plankton-flora. 



^) Abbreviations: V. H. = Van Heurck, Synopsis des diatomées de Belgique, 

 Anvers 1885. cc — : abundant, c — : common, + soraewhat frequent, — : less 

 frequent, r: rare. 



