136 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



nule base. First segment short, squat, heavily sclerotized, with 

 very slight indication of posterior projection at base; second segment 

 slightly more than two-thirds as wide as long, narrower distaUy 

 than proximally. Third segment fused ^\dth clawlike terminal process, 

 bearing small, lappet-like projection on proximal posterior surface 

 and small spinule-like accessory process at distinct break in scleroti- 

 zation in proximal half of fused segment and terminal process. Male 

 antenna (fig. 50d) 3-segmented, first segment elongate, heavily sclero- 

 tized, irregular; second segment shorter than first, broad proximally, 

 tapered to narrower distal end, with ridged, lappet-like adhesion pad 

 on distal inner surface, just proximal to third segment articulation 

 surface and apparently receiving terminal process of third segment 

 when segment flexed. Third segment fused -with short, clawhke 

 terminal process, bearing setule-like accessory process on anterior 

 surface. 



Female and male mandible (fig. 50c) 4-parted, distalmost part 

 flattened, curved inward, with 12 denticulations along inner surface. 

 Female postantennal process (fig. 50c) situated lateral to antenna, 

 consisting of short, clawlike projection and 3 nodules, 2 on base of claw, 

 third posterior to claw, each with several hairlike processes. Male 

 postantennal process (fig. 50d) immediately lateral to antennal base, 

 clawlike process much longer than in female and strongly curved dis- 

 tally, nodes as in female. Female and male postoral process (fig. 50c) 

 long, spinelike, curved outward distally. Female and male maxillule 

 (fig. 50c) nodular, with 3 setules. Female and male maxilla (fig. 50c) 

 2-segmented, situated lateral and slightly posterior to postoral process. 

 Fu-st segment slightly shorter than second, more strongly developed; 

 second segment elongate, tapered proximally, wdth fine membrane 

 along inner medial surface and 2 saber-shaped terminal processes. 

 Innermost terminal process slighty less then IK times the length of 

 outermost, with fine membrane along inner margin; outermost process 

 mth finely frilled membrane along both margins. 



Female and male maxilliped (fig. 50/) 2-segmented, situated poste- 

 rior and medial to maxilla base. First segment strongly developed, 

 broad medially, tapering proximally and distally, proximal end 

 strongly curved, heavily sclerotized; small, subcorneal projection pres- 

 ent on inner medial surface. Second segment distinct from clawHke 

 terminal process, with setule-like accessory process on distal inner 

 surface. Female and male sternal furca (fig. 50g) situated on median 

 longitudinal axis of body, posterior to maxilliped bases. Base of furca 



Figure 51. — Caligus asymmetricus Kabata, 1965b, right thoracic legs, anterior view: a, first; 

 b, second segment of exopodite of first; c, second; d, third; e, exopodite of third (posterior 

 view);/, fourth. 



