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Explanation of Plates. 



Plate I. — Cyclops fuscus Jurine. Cyclops albidus Jurine. 



Fig. 1. — C. fuscus, adult female. Oc. 2, obj. 1. (Ocular and objective 

 numbers refer to Leitz lenses unless otherwise noted. All drawings were 

 made with the help of the camera lucida.) 



