COPEPODA 



785 



4 (3) Second antennae half the entire length. 



Ergasilus labracis Kroyer 1863. 



The two basal segments without swellings or processes; found on the 

 striped bass, Roccus lineatus. 



FIG. 1237. Ergasilus labracis. (After Wilson.) 



Anterior margin of the carapace projecting strongly at the center 

 in a rounded knob, first antennae much longer than in 2. . 6 



Terminal claw of second antennae simple. 



Ergasilus centrarchidarum Wright 1882. 



Both rami of fourth feet three-segmented. Found on the family 

 Centrarchidae, the redeye, Ambloplites rupestris, small- mouth black 

 bass, Micropterus dolomieu, etc. 



FIG. 1238. Ergasilus centrarchidarum. (After Wilson.) 



7 (6) Terminal claw toothed on the inner margin, 



Ergasilus caeruleus Wilson 1911. 



Exopodites of fourth feet two-segmented. Found on the bluegill, 

 Lepomis pallidtis. 



FlG. 1239. Ergasilus caeruleus. (After Wilson.) 



