Diaptomus Pseudoscmguineus Sp. Nov. 7 



Cladocera 

 family bosminidae 



GENUS BOSMINA BAIRD 1845 



1. BOSMINA L.ONGIROSTRIS (O. F. Mueller) 1785. 



Bosmina longirostris, Birge, '18. p. 706. fig. 1096. 

 Common in this district, being abundant in many of the no-outlet pond* 

 during the warm season. It has been found where vegetation does and doea 

 not exist The hydrogen Ion content of the water was determined for only 

 three ponds, varying from PH 7.8 to 8.2. 



FAMILY CHYDORIDAE 

 GENUS ALONA BAIRD 1850 



2. ALONA COSTATA Sars 1862. 



Alona costata, Herrick & Turner, '95. pp. 245, 246. pi. 60, fig. I. 

 Collected in November, 1909, among pond lilies in a small no-outlet pond 

 having a temperature of IS'C, the only time encountered in this district. 



3. ALONA RECTANGULAR Sars 1861. 



Alona pulchra, Herrick & Turner. '95. p. 245. 

 In May, 1921, this species was found in a marsh and in a large no-outlet 

 pond. The hydrogen ion content in each case was PH 8.2. The tempera- 

 ture of the water was 27°C. 



GENUS CHYDORUS LEACH 1843 



4. CHYDORUS SPHAERICUS (O. F. Mueller) 1783. 



Chydorus sphaericus, Birge, '78. pp. 23, 24. 



Chydorus aphaericua, Herrick & Turner, '95. p. 261. pi. 64, fig. 4, 

 7. 8, 10. 

 This species is common in marshes and among the vegetation in certain 

 no-outlet ponds of this district. The temperature of the water in which 

 It was found varied from 18-31°C. The hydrogen ion content of the water 

 was determined in only one instance, being 8.2. May to October. 

 GENUS KURZIA DYBOWSKI AND GROCHOWSKI 1894 



6. KURZIA LATISSIMA (Kurz) 1874. 



Kurzia latissima Birge, '18. p. 718. fig. 1120. 



Alonopais latiaaima, Herrick and Turner, '95. pp. 232, 233. pi. 81. 

 fig. 8 ; pi. 68. fig. 1, 9. 

 Collected on two occasions in July, 1920, in large numbers among water 

 plantain in a shallow lake. 



GENUS LEYDIGIA KURZ 1874 



6. LEYDIGIA QUA DRANG ULARIS (Leydig) 1860 



Leydigia quadrangularis, Herrick & Turner, '95. p. 234. pi. 59, 



fig. 8; pi. «0, fig. 4. 



Collected twice in this neighborhood, in April, 1910, among water lilies. 



In a shallow no-outlet pond, the temperature of which was 20°C. ; and In 



August. 1921, in a shallow no-outlet pond, the temperature of which was 



32"'C. and the hydrogen ion content PH 7.4. 



7. LEYDIGIA ACANTHROCERCOIDES (Fischer) 1854. 



Leydigia acanthocercoidcs, Herrick & Turner, '95. p. 234. 

 A few specimens of this collected on June 25, 1910, in a no-outlet pond, 

 the only time it has been encountered. 



GENUS OXYURELLA DYBOWSKI AND GROCHOWSKI 1894. 



8. OXYURELLA TENUICAUDIS (Sars) 1862. 



-IJono tenutcaudia, Herrick & Turner, '95. pp. 242, 243, pi. 62. 

 fig. 11. 

 A few collected in June, 1921. in a shallow transitional pond having a 

 temperature of 24 °C. 



