ORDER CLADOCERA. 



FAMILY SIDIDJ]. 



GENUS SIDA Straus. 



Sida crystallina Miiller. 



Sida crystallina — C. L. Herrick, Final Keport on Minn. Crust., p. 20. 



Habitat: Cincinnati, Ohio. Eare. Occurs in deep canal basins. 



FAMILY DAPHNIDJ:. 



GENUS MOINA Baird. 



Moina rectirostris Miiller, 



Moina rectirostris— C L. Herrick, Final Report on Minn. Crust., p. 34; PI. A., 

 Figs. 2, 5, 8, 10, 11. 



Length of female 0.94 mm.; height 0.63 mm. Habitat: Atlanta, Ga. 



Moina paradoxa Weismann. 



Bloina paradoxa — C. L. Herrick, Final Report on Minn. Crust., p. 34; PI. A, 

 Figs. 1, 3, 6, 7, 9. 



Habitat: Cincinnati, Ohio. During the latter portion of summer 

 this species is very abundant in foul pools. 



GENUS CERIODAPHNIA Dana. 



Ceriodaphnia censors Birge. 



Ceriodaphnia censors— E. A. Birge, Notes on Clad., p. 5; PI. 1, Figs. 3, 4. 



Length 0.55 mm. to 0.61 mm.; height 0.40 mm. The reticulations 

 on the shell are singly contoured. Habitat: Atlanta, Georgia. "Winter 

 and summer. 



Ceriodaphnia megops Sars. 

 Ceriodaphnia cristata — E. A. Birge, Notes on Clad., p. 6; PI. II, Figs. 8, 9. 



Length 0.64 mm.; height 0.50 mm. Habitat: Kent county, Dela- 

 ware; Atlanta, Georgia. 



