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 longimanus, female. 



A curious large protozoan; a. infundibulum frame work 

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

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



