OF DENISON UNIVERSITY. 



Pleiiroxtis hainatiis, Birge. 



25 



Pleuroxus hamatus, . . . E. A. Birge. Notes on Clad. (1878), pp. 



22-23; pi. II, figs. 13, 14. 

 Pleuroxus hamatus, . . . C. L. Herrick. Final Report on Minn. 



Crust. (1884), p. no; pi. H, fig. i. 

 Pleuroxus haviatns, . . . C. H.Turner. Notes on Clad. Cop. Ost. 



and Rot. of Cin'ti. (1892), pp. 68-69. Add. Notes on Clad, and Ost. 



of Cincinnati, Ohio, p. 6, (1893). 



Length, 0.46 mm. -0.52 mm.; height, 0.23 mm. -0.33 mm. 

 Habitat: Atlanta, Ga., Mrs. Reeves' pond. 



I Genus Chydorus, Leach. 



CJiydorus spJiaeriais, Miiller. 



Chydorus sphaericus, . . . E. A. Birge. Notes on Clad. (1878), 



pp. 23-24; pi. II, fig. 19. 

 Chydorus sphaericus, . . . S. A. Forbes. On Some Lake Superior 



Entom., (1890), p. 712. 

 Chydorus sphaericus, . . . C. L. Herrick. Micro. Entom. Minn. 



Geol. Surv. (1879), p. 108, pi. XIII. Final Report Minn. Crust. 



(1884), p. 116; pi. F, figs. 4, 7, 8, 10. 

 Chydorus sphaericus, . . . C. H. Turner. Notes on Clad., Cop., 



Ost. and Rot. of Cin'ti. (1892), p. 69. Add. Notes on Clad, and Ost. 



of Cincinnati, O., p. 6. 



Length, 0.36 mm. -0.42 mm.; height, 0.31 mm. -0.36 mm. 



Habitat: Atlanta, Ga., South River Slough, Mrs. Reeves' 

 Pond, Water Works Pond. This species occurs here at all sea- 

 sons. 



Fig. I 



specimen. 

 Fig. 2 



^ig' 3 

 Fig. 4 



Fig. 6 



Pig'l 

 Fig.% 



EXPLANATION OF PLATES. 



PLATE VII. 



Cypria exculpta, Fischer. Lateral view of the shell of a young 



Cypria exculpta, Fischer. 



(i 





Second foot. 



Lateral view. 



First foot. 



Shell markings. 



Antenna. 



Post-abdomen. 



Second maxillae of male. 



