6 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
Female fifth pedigerous segment slightly less than half the width 
of third and fourth, widest medially, in region of leg attachment. 
Genital segment (figs. 2d, e) broadest medially, tapered to posterior 
and anterior ends. Oviducal openings situated on lateral dorsal 
surface, region around openings ornamented with heavily sclerotized 
platelets. Sixth legs situated on dorsal surface, adjacent to oviducal 
openings, consisting of 3 lightly plumose setae originating from nodule. 
First segment of female abdomen subrectangular, length approxi- 
mately three-fourths that of genital segment. Second segment sub- 
rectangular, four-fifths the length of first. Third segment slightly 
longer than second, tapered posteriorly, posterior surface with bilobed 
anal indentation. Caudal ramus (fig. 2f) subconical, bearing 3 naked 
or lightly plumose setules on outer surface and large, lightly plumose 
seta as well as 2 lightly plumose setules from distal surface. 
Cephalothorax and free second pedigerous segment of male (fig. 26) 
generally similar to those of female. Third and fourth pedigerous 
segments distinct, not fused as in female. Both segments of about 
equal length, third approximately one and one-third times the width 
of fourth. Fifth pedigerous, genital, and abdominal segments similar 
to those of female. 
Female and male antennule (fig. 3a) 5-segmented, attached to 
ventral surface of inner lobe of bilobed projection at anterior end of 
cephalothorax. Segment lengths, in micra, 205:135:90:95:100. First 
segment with base at right angles to rest of segment and appendage, 
bearing 14 lightly plumose setae along anterior surface, 3 naked 
setules on posterior distal surface. Second through fifth segments 
rodlike; second with 6 lightly plumose and 3 naked setules, third 
with 3 naked setules, fourth with 2 naked setae on distal surface. 
Fifth segment with single, naked setule on distal posterior surface, 
also with 3 naked setules and one naked seta on distal surface. 
Female and male antenna (fig. 3b) 3-segmented, attached slightly 
posterior and lateral to antennule base. First segment approximately 
equal to combined lengths of remaining two, tapered towards distal 
end, with single naked seta distally. Second segment short, unarmed. 
Third segment with ventrally facing rows of clawlike denticulations 
along entire surface and extending on toelike projection of distal 
surface. Distal surface also with 2 denticulated spines (one not shown 
in figure), one clawlike spine, and 5 clawlike setae. 
Female and male mandible (figs. 3c,d) 1-segmented, basal region 
enlarged, with heavily sclerotized medial ridge; distal half rodlike. 
Distal end of segment bearing 1 large and 1 small, flattened spines 
serrated along anterior margins. Maxillule (fig. 3c) nodular, situated 
immediately posterior to mandible base, with 2 plumose setae and 2 
plumose setules. Maxilla (figs. 3c,e) 2-segmented, proximal segment 
