COPEPOD CRUSTACEANS — LEWIS 



165 



tion on medial outer surface, indentation bearing single plumose seta. 

 Three plumose setae present on distal surface; single plumose setule 

 on inner distal surface, second on outer surface, just medial to indenta- 



0.05 nnmoc 



0.05mm.9cr^ 



Figure 62. — Caligus ligatus Lewis, 1964, dorsal view: a, female; h, male; c, posterior ceph- 

 alothoracic simus. Ventral view: d, female genital segment; e, male, same; /, female left 

 fifth leg; g, male right fifth (V) and sixth (VI) legs; h, caudal ramus. 



tion; distal half of inner surface plumose. 



Male cephalothoax (fig. 626) similar to that of female, free fourth 

 pedigerous segment also similar except for irregular posterior lateral 



