PARASITIC COPEPOD CRUSTACEANS — LEWIS 121 



(figs. 28e, /) consisting of pad, immediately lateral to mouth cone, 

 with pair of minute setules in female and subtriangular projection in 

 male. Postoral process attached to platelike area of heavy scleroti- 

 zation contiguous but not continuous with plateUke area forming 

 articulation surface for mandible. Female and male postoral ad- 

 hesion pads (figs. 28a, b) lappet-like, heavily sclerotized, situated 

 posterior and slightly lateral to postoral process. 



Female and male maxilla (fig. 2Sg) 2-segmented, situated just 

 lateral to postoral adhesion pads. Fhst segment approxunately one 

 and one-half times the length of second, second segment slender, 

 distal region with 1 short and 1 long, membrane-margined, saber- 

 shaped process in addition to plumose, knob-shaped projection. 



Female maxilliped (fig. 29a) 2-segmented, first segment appearing 

 2-parted and strongly developed. Proximal part broader distally 

 than proximally, distal part large, knob-shaped, at right angles to 

 first part, with adhesion pad distally; both parts connected, without 

 segmental division separating them. Second segment short, irreg- 

 ular, situated on distal surface of knob-shaped distal part of first 

 segment and bearing single, clawlike terminal process. Male max- 

 illiped (fig. 296) also with 2-parted first segment although second 

 part in line with first, bearing 2 adhesion pads and spike-shaped 

 protrusion. Second segment with distal end of clawlike terminal 

 process denticulated. Single, setule-like accessory process at dis- 

 tinct division between segment and terminal process. 



Thoracic legs I-IV bhamous, first 3 with 2-segmented rami, fourth 

 with 1-segmented although slight indication of segmentation present 

 in male endopodite as indistinct line. For natm*e of armature and 

 legs see tables 11-12 and figures 29c-/, 30a-d. 



Remarks. — The armature of the male thoracic legs differs from 

 that given by Wilson (1935) although the presence of a copulating 

 pair in the collection suggests that the male and female specimens 

 are of the same species. Further, an examination of the males of 

 Wilson's collection (USNM 64057) verified the identification of the 

 male and indicated that the thoracic leg armature in table 12 is cor- 

 rect for the male of the species. Some variation is present, both in 

 WUson's collection and in the Hawaiian collection, especially in the 

 shape of the posterior end of the male genital segment and the size 

 of the postoral adhesion pads. The nature of the body and the 

 appendages, especially the thoracic legs, indicates however, that the 

 specimens in both collections are conspecific. 



782-215—66- 



