Daphnia kalbcrgensis. 



Fourth foot. 



Outer ramus of first foot. 



Typical form. 



Fig. 



1. Of moderate size. 



2. Antenuule of male. 



3. Head of variety. 



4. Cyclops piikhelliis (tliomasi). 



5. " piilchellns (tliomasi). 



6. Dapliiiiji hyaliiia (D. galeata). 



7. Cyclops tliomasi. Fifth foo . 



8. " tliomasi. Stylet. 



9. Cyclops (iiisectus?). Fourth foot. 



10. IJytliotrephes longiniaiius. Female. 



11. A curious large j)rotozoan; a. infundibulum frame work; h. 



pulsating vacuole; c, nucleus; d. food and digested matter; e. 

 protective rods; 11a. spicules of the infundibulum. 



