Distribution of the Species. 



193 



is my reluctance to add to the cumbersome nomenclature of the 

 genera under discussion. For example, I have no doubt of the 

 identity of a Wisconsin species with Cyclops brevispinosus Her- 

 rick, but Herrick's description is not sufficient for a satisfac- 

 tory identification. Therefore, rather than to add a new species 

 name, I have ventured to describe this species more completely. 

 Inasmuch as printed descriptions, even when accurate, are 

 frequently misleading, and as a list of species is only valuable 

 when one is certain of the accuracy of the identification, I have, 

 in most cases, drawn figures of the essential anatomical char- 

 acteristics of the species treated of, and trust that I shall have 

 made clear at least what species I have described, and have 

 rendered it possible, if I have made mistakes, for others to 

 detect those mistakes. 



\. 



Diaptomus sanguineus 

 ' ' leptopus. . . 



1 ' pallidus .... 



1 < sicilis 



' ' ashlandi. . . . 



' ' minutus 



' ' oregonensis . . 



Epischitra lacustris 



Limnocalanus macrurus 

 Cyclops americanus .... 



brevispinosus . . . 



ramus 



pulchellus 



parens 



leuckarti 



signatus 



modestus 



fliiviatilis 



sermdatus . 

 phaleratus 

 bicolor . . . 

 Jimbriatus. 



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