282 Birge — Notes on Cladoeera. 



Lillj. Daphnia minnehaha, Herrick, and Pleuroxus trigonellus, 

 O. F. M. , were also found at Tomahawk, Wis. There have, 

 therefore, been collected from central and northern Wisconsin 

 a total of sixty-nine species and varieties, which in most Euro- 

 pean lists rank as species. 



The following species in the list are new to science: ' 



Ceriodaphnia lacustris, sp. nov. 



Daphnia Kahlbergiensis Schdl. var. breviceps, var. nov. 



Bunops scutifrons, gen. et sp. nov. 



Anchistropns minor, sp. nov. 



Chydorus faviformis, sp. nov. 



The following species are new to the United States : 

 Simocephalus exspinosus, Koch. 

 Ceriodaphnia quadrangula, Sars. 

 Streblocerus serricaudatus, Fisch. 

 1 Acantholeberis curvirostris, O. F. M. 

 Alona falcata, Sars. 

 Alonella rostrata, Koch. 

 Pleuroxus hastatus, Sars. 

 Acroperus angustatus, Sars. 



The following species are new to Wisconsin: 

 Daphnia pulex, var. pulicaria, Forbes. 

 Monospilus tenuirostris, Fisch. 

 Pleuroxus nanus, Baird. 

 Chydorus rugulosus, Forbes. 



The following species and varieties have not as yet been 

 found in southern Wisconsin, although no doubt many of them 

 will be discovered there : 



Daphnia Kahlbergiensis, var. breviceps, Birge. 



Acantholeberis curvirostris, O. F. M. 



Alona falcata, Sars. 



Alonella rostrata, Sars. 



Monosp>ilus tenuirostris, Fisch. 



Pleuroxus nanus, Baird. 



Pleuroxus hastatus, Sars. 



Chydorus rugidosus, Forbes. 



Chydorus faviformis, Birge. 



