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. 
Green Lake. 
Little Green Lake. 
Lake Winnebago. 
Twin Lakes. 
Spring Lake. 
Rush Lake. 
Heart Lake. 
Lake Puckaway. 
Lake Minocqua. 
Great Lakes. 
Stagnant Pools. || 
Diaptomus sanauineus . 
X 
X 
1 4 leptopus . 
4 $ pallidus . 
X 
1 4 sicilis . 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
41 ashlandi . 
14 minutus . 
X 
44 oregonensis . 
X 
X 
X 
X 
Epischura lacustris . 
X 
X 
X 
X 
X 
Limnocalanus macrurus . 
* 
Cyclops americanus . 
X 
X 
X 
X 
‘ ‘ brevispinosus . 
4 4 navus . 
X 
X 
X 
X 
X 
X 
X 
4 4 pulchellus . 
X 
X 
X 
44 parcus . 
‘ ‘ leuckarti . 
11 signatus .'.. 
4 4 modestus . 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
44 fluviatilis .. 
X 
X 
X 
x 
X 
X 
X 
X 
X 
X 
X 
X 
X 
41 , serrulatus . 
‘ £ phaleratus . 
X 
X 
X 
X 
X 
X 
X 
X 
11 bicolor .. 
“ fimbriatus . 
t/ 
