24 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
approximately 30 bifid spines on ventral surface. Fifth leg (fig. 129) 
situated on posterior medial lateral surface, consisting of slight inden- 
tation bearing 3 plumose setules and single naked, spinelike projection. 
Sixth leg (fig. 12h) situated on small projection of ventral lateral 
posterior surface, consisting of 3 plumose setules. Abdomen short, 
1-seemented, slightly wider posteriorly than anteriorly. Caudal rami 
as in female. 
Female and male antennule (fig. 11a) 2-segmented, situated on 
lateral anterior ventral surface of cephalothorax and adjacent portion 
of frontal region. Second segment approximately three-fourths the 
length of first, first clubshaped, bearing approximately 26 lightly 
plumose setules (plumosites not shown in figure) on anterior and 
anterior ventral surface. Second segment rodlike, with 1 naked setule 
on medial posterior surface and 12 on distal surface. Female antenna 
(fig. 116) 3-segmented, situated posterior and slightly medial to 
antennule base. First segment dactyliform, attached to padlike 
projection of cephalothorax. Second segment subrectangular, ap- 
proximately the same length as first segment. Third segment incom- 
pletely fused to clawlike terminal process, bearing single, setule-like 
accessory process. First and second segments of male antenna (fig. 
llc) similar to those of female except second with small, earshaped 
area of heavy sclerotization on distal posterior surface. Third segment 
fused to clawlike terminal process, accessory processes consisting of 
spinelike secondary claw and 2 naked, setule-like structures. 
Female and male mandible (fig. 116) 4-parted, distalmost part 
flattened, inner margin with 12 denticulations. Female postantennal 
process (fig. 116) situated posterior and slightly lateral to antenna 
base, consisting of 3 minute nodules, each appearing to have several 
hairlike processes. Male postantennal process (fig. lle) consisting of 
2 nodules (posteriormost of female not visible on male), each with 
several hairlike processes. Female and male mazxillule (fig. 110) 
situated immediately lateral to mouth cone base, consisting of 3 
naked setules appearing to arise directly from lobate projection fitting 
over knoblike extension of cuticle. Lobate projection bearing elongate, 
slightly curved spine forming postoral process, spine with minute 
nodule on distal inner surface. Lobate projection and spine without 
distinct indication of adhesion surface on either male or female. 
Female and male maxilla (fig. 11d) 2-segmented, situated lateral and 
slightly posterior to maxillule. Second segment slightly less than 
three-fourths the length of first (including articulation and muscle 
attachment surface at proximal end of first). First segment sub- 
rectangular, more strongly developed than second, second rodlike, 
with pair of denticulated membranes in distal half and pair of saber- 
shaped terminal processes. Innermost terminal process approximately 
