166 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



margins. Genital segment (fig. Q2e) subovoid, fifth legs (fig. 62^) 

 arising from ventral lateral surface, consisting of 2 knobs, each with 

 single, plumose setule; sixth legs (fig. 62^) arising from slight swell- 

 ing on lateral-posterior ventral surface, consisting of minute nodiJe 

 bearing 3 plumose setules. Abdomen distinctly 2-segmented, first 

 segment approximately one-third the total length, constricted sharply 

 posteriorly; second segment slightly wider posteriorly than anteri- 

 orly. Caudal rami as in female. 



Female and male antennule (fig. 636) 2-segmented, attached to 

 anterior ventral surface of cephalothorax, not attached to adjacent 

 frontal region. First segment slightly less than IK times the length 

 of second, narrow proxunally and distally, broad medially; distal 

 half of anterior and anterior ventral smiace with approximately 

 23 plumose setae and setules. Second segment club shaped, with 

 single naked setule from distal half of posterior sm-f ace, approximately 

 11 naked setules from distal surface. Female antenna (fig. 63c) 

 3-segmented, situated posterior and medial to antennide base. Fu'st 

 segment dactyliform, ventrally facing sm'face irregular; second seg- 

 ment broader proximally than distally. Third segment short, incom- 

 pletely fused to clawlike terminal process, with single setule-like 

 accessory process from posterior medial smiace. Male antenna (fig. 

 Q3d) 3-segmented, first segment elongate, irregular; second segment 

 broader proximally than distaUy, with adhesion surface on proximal 

 half of anterior surface and small, shelf like adhesion surface project- 

 ing from distal half. Third segment short, incompletely fused with 

 short, bifurcate terminal process, tines of bifurcation sharply 

 pointed. Single, setule-like accessory process present on distal 

 anterior surface of segment. 



Female and male mandible (fig. 63c) 4-parted, distalmost part 

 curved medially, with 12 denticulations. Postantennal process of 

 female (fig. 63c) situated lateral and sHghtly posterior to antenna 

 base, consisting of short, clawlike projection with 3 associated nodules, 

 2 on base of projection, third just posterior to base, each with several 

 hairlike processes. Male postantennal process (fig. Q3d) consisting of 

 long, strongly curved, clawlike projection with 2 nodules proximally, 

 each with several hairlike processes, third nodule not visible. Female 

 and male postoral process (fig. 63c) with broad base, tapered abruptly 

 to slender, slightly curved spinelike projection. Female and male 

 maxillule (fig. 63c) nodular, with 2 small and 1 large setule. Female 

 and male maxilla (fig. 636) 2-segmented, situated lateral and shghtly 

 posterior to postoral process. First segment slightly more than 

 foiu--fifths the length of second, narrower proximally and distally 

 than medially. Second segment elongate, with small, lobate mem- 

 brane on distal half of posterior surface and 2 saber-shaped terminal 



