Fig. 



1. 



Fig. 



2. 



Fig. 



3. 



Fig. 



4. 



Fig. 



5. 



Fig. 



6. 



Fig. 



7. 



Fig. 



8. 



Fig. 



9. 



Fig. 



10. 



Fig. 



11. 



PLATE U. 



Daphnia kalbergensis, of moderate size. 



" " antennule of malo. 



" " head of var. 



Cyclops thomasi^ fourth foot. 



" " outer ramus of first foot. 



Daphnia galeata, typical form, 

 Cyclops thomasi, fifth foot. 



stylet. 

 Cyclops (insectus?)^ fourth foot. 

 Bythotrephes longhnanus, female. 



A curious large protozoan; a. infandibulum frame work 

 b. pulsating vacuole; c. nucleus; d. food and digested mat- 

 ter; e. protective rods: 11a. spicules of the infundibulum. 



