138 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lis 



of long, subcorneal projections extending from posterolateral surfaces, 

 projecting posteriorly well past caudal rami, with heavily sclerotized, 

 spinule-bearing ridge extending along dorsal surface of process, con- 

 tinuing, without spinules, along margin of medial posterior end of 

 genital segment. Outer margin of process usually with some spinules 

 although number variable, from the more heavily spined condition 

 shown in figures 36a, c to a condition in which there are few or, in one 

 specimen, no spinules along the medial outer margin. Posterior end 

 of process sharply rounded, with cluster of 4 spinules, somewhat 

 larger than those along outer margin. 



Abdomen (fig. 36c) 2-segmented although fusion of segments 

 evident, attached to posterior surface of genital segment, at apex of 

 median depression. First segment approximately equal to length of 

 second, with pair of long, lobate extensions projecting laterally then 

 curving posteriorly and extending to end of abdomen, projections 

 with spinules scattered over dorsal surface and margin (not mentioned 

 by either Wilson or Shiino). Second segment widest medially, 

 lateral margins convex, posterior angled to anal indentation. Caudal 

 rami slightly less than twice as long as wide, narrower proximally 

 than medially, slightly tapered to distal end, bearing 4 plumose setae 

 and 2 setules, 2 of the setae originating from small, knoblike pro- 

 jection of medial distal surface. 



Antennule (fig. 37a) 2-segmented, first segment slightly less than 

 3 times the length of second, narrow proximally, broadest medially, 

 slightly narrower distally, anteroventral and distal-ventral surface 

 with approximately 19 naked or very lightly plumose setules. Second 

 segment club shaped, with 8 naked setules distally. Antenna (fig. 

 376) situated posterior and medial to antennule base, appearing 

 4-segmented although nature of musculature (partially shown in fig. 

 376) suggests either secondary division (or incomplete fusion) of 

 proximal 2 parts or that first part a projection of cephalo thorax. 

 Penultimate segment large, oval; distal segment and terminal process 

 slightly shorter than penultimate, segment not distinct from distally 

 curved terminal process. Accessory processes 2 in number, 1 long, 

 setule-like process arising from middle of fused segment and terminal 

 process, second short and knoblike, situated at proximal end of 

 segment. 



Mandible (fig. 376) rodlike, appearing 4-parted, distal part bluntly 

 rounded distally, inner margin with 12 denticulations. Postantennal 

 process (fig. 376, "pap") a small adhesion pad lateral and slightly 

 posterior to antenna base, with 3 nodules, bearing hairlike projections, 

 just medial to pad. Postoral process (fig. 376) 2-parted, posterior 

 part a broad, padlike structure with narrow membrane along distal 

 surface, anterior part a node bearing 3 projections, each with single 



