PLATE S. 



Ergasilus depressu&, male. 



Cyclops oithonoides (Amer. C tenuissimus, var.), stylets. 



fifth foot. 



" " antennules. 



" " fourth feet. 



" " antenna of male. 



" " brevispinosus, stylet. 



" ♦' ''■ inner maxilliped. 



" " " swimming foot. 



<i 



" " fifth foot, 



" " antennule. 



" » " opening of spermatheca. 



Cyclops sp.?, nauplius. 



