ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1900, NIO 1. 29 



a trustwortliy examination in this direction. Length of the 

 sagittal axis 0,014 m.ni. of the longitudinal axis 0,007 to 

 0,01 m.m.» 



In addition to those Professor Cleve also found in the same 

 samples from Baku the following litoral forms: 



Campylodiscus dcBmelianus Grun., 



Grammatoptera marina var., 



Surirdla striatula (Turpin), 

 all of these however rather sparingly represented. 



It becomes evident from this list that the plankton of the 

 spring contains only one diatom (and perhaps a dinoflagellate) 

 which is endemic in the Caspian Sea. Among the other three 

 species are at home in the Baltic and the North Atlantic, the 

 fourth being a cosmopolite. 



It seems rather peculiar that although the water already 



had such a high temperature as + 13' f- 16° C. the plankton 



was so little developed, which can be concluded from the fact 

 that there were no fully developed crustacea, but only larva? 

 which could not be determined. These circumstances are the 

 more peculiar as in a small saltlake near Fort Alexandrovsk 

 (Mangischlak, Transcaspia) the Entomostraca at the same time 

 of the year were developed, I there collected Canthocamptus 

 hlanchardi RiCHARD according to Professor Lilljeborg's deter- 

 mination and I also saw there a larger Cyclops with great säcks 

 of ova although this has been lost. Ccmthocamptus bkmchardi 

 is originally described from North Africa. 



