158 Trans. Acad. Sci. of St. Louis. 



10. cyclops signatus Koch, var. tenuicornis Claus. 



Cyclops signatus, var. tenuicornis, Herrick & Turner, '95, pp. 106, 

 107; pi. XV., fig. 5-7; pi. XX., fig. 1-7; pi. XXXIII., fig. 1, 2. 

 Cyclops alMdus, E. B. Forbes, '97, pp. 47-49; pi. XIII. 



This form is common about Augusta. I found it in 

 marshes, in no-outlet ponds containing much vegetation, 

 and in lagoons that were almost free from aquatic vege- 

 tation; when the temperature of the water ranged from 

 6° C. to 15° C. On no occasion did I find this variety 

 associated with the variety coronatus. 



11. cyclops ater Herrick. 



Cyclops ater, Herrick & Turner, '95, pp. 89-90; pi. VI., fig. 11, 12; 



pi. XII., fig. 9-12; XXI., fig. 13-15, 17, 18. 

 Cyclops ater, E. B. Forbes, '97, pp. 49-51; pi. XIV., and pi. XV., 



fig. 1-3. 



This form was found in the temporary portion of a 

 no-outlet pond, in temporary ponds, and in a pond fed 

 by the overflow from a large creek. The temperature 

 of the water ranged from 4° C. to 17° C. The color of 

 the thorax varied from dark blue to almost black. 



12. cyclops seerulatus Fischer. 



Cyclops serrulatus, Herrick & Turner, '95, pp. 111-112; pi. XV.; 



fig. 8-11; pi. XIX., fig. 2-5; pi. XXVI., fig. 10; pi. XXIX., fig. 



17-19. 

 Cyclops serrulatus, E. B. Forbes, '97, pp. 54-57; pi. XVII., pi. 



XVIII., fig. 1-3. 



This is the commonest copepod about Augusta. It 

 abounds in temporary ponds, ditches and permanent 

 ponds of both types. It is found among vegetation and 

 where the aquatic vegetation is practically absent. The 

 temperature of the water in which it was found varied 

 from 4° C. to 28.5° C. 



In addition to the Entomostraca mentioned in the table, 

 associated with it were gammarids, hydrachnids, may- 

 fly larvae, diving beetles, larvae of Diptera, planarians, 

 rotifers, snails, water-boatmen, Hydra. 



