76 G- O. Sars. 



41, Cyclops phaleratus, Koch. 



Some specimens of this species occurred in a sample 

 from the Centennial Park. 



42. Cyclops affinis, G. O. Sars. 



Very frequent in several samples: Waterloo Swamps; 

 Centennial Park; Bourke Street; Waterloo Swamps; water- 

 holes at Bourke Street; opposite the Rope Works; Near 

 Sydney. It was also found in great abundance in my 

 aquaria. 



Explanation of the plates. 



PI. I. 



Daphnia carinata, King. 



Fig. 1. Typical form: ovigerous female, seen from left 



side; magnified 26 diameters. 

 » 2. Tail of same, more highly magnified. 

 » 3. Var. intermedia: female with ephippium, seen from 



left side; magnified 26. diameters. 

 » 4. Var. magniceps : ovigerous female, seen from left 



side; magnified 26 diameters. 



PI. II. 



Simocephalus acutirostratus, King. 



Fig. 1. Ovigerous female, seen from left side; magnified 



24 diameters. 

 » 2. Anterior part of the body, more highly magnified 



(antennæ omitted). 

 » 3. Tail. 



