COLD SPRING HARBOR MONOGRAPHS. VII. 



FRESH WATER CYCLOPS OF LONG ISLAND. 



Esther F. Byrnes. 



TABLE OF CONTENTS. 



PAGE 



rntroduction 5 



List of Species Studied 4 



Cyclops ater — Herrick 5 



Description of the Two Forms 5 



Variations in C. ater 7 



Cyclops signatus — Koch 8 



General Description 8 



Cyclops signatus, var. coronatus g 



Transitional Stages of C. signatus, coronatus 10 



Cyclops signatus, var. annulicornis 10 



Younger Stages of C. signatus, var. annulicornis 11 



Variations in C. signatus, var. annulicornis 12 



Cyclops Americanus — Marsh 13 



Cyclops parcus — Herrk k 14 



Cyclops brevispinosus — Herrick 16 



Cieneral Description 16 



Heterogenous Form 17 



Variations 21 



Cyclops ingens — Herrick ? 22 



Cyclops virido — signatus, n. sp 23 



Cyclops pulchellus — Herrick 24 



Cyclops bicuspidatus — Forises 25 



Cyclops modestus — Herrick 26 



Cyclops serrulatus — Forbes 27 



Cyclops fluviatilis — Herrick 28 



Cyclops bicolor — Sars 29 



Cyclops phaleratus — Koch 31 



Cyclops fimbriatus— Fischer 33 



Summary 34 



Distribution 34 



Variations in Cyclops 34 



Literature Cited 37 



