30 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
tensions, each with approximately 4 spinules posteriorly. Division 
between fourth pedigerous and genital segments distinct, complete. 
Male genital segment (fig. 130) with convex lateral margins an- 
teriorly, tapered posteriorly. Anterior and posterior halves each with 
cluster of spinules and spines laterally. Posterior margin flat dorsally, 
bilobed ventrally. Fifth legs (fig. 13g) situated at break between 
anterior and posterior halves, consisting of node bearing 3 naked 
setules. Sixth legs (fig. 13h) situated on posterior end of lobe on 
ventral surface, consisting of 3 naked setules. Abdomen, 2-segmented, 
distinct from genital segment. First segment subrectangular, ap- 
proximately five-eighths the length of second segment, medial lateral 
surfaces with cluster of spines and spinules. Second segment con- 
tinuous with caudal rami, slightly wider posteriorly than anteriorly, 
anal indentation distinct. Caudal rami subrectangular plumose 
along distal inner surface. Rami bearing 3 plumose terminal setae, 
1 plumose seta on lateral distal surface, and 2 plumose setules, first 
on distal inner surface, second just medial to outermost seta. Outer 
surface of rami with several minute spinules. 
Male antennule similar to that of female although second segment 
approximately half the length of first, not one-third as in female. 
Antenna (fig. 13¢) 3-segmented, situated posterior and medial to 
antennule base. First segment irregular, with ridgelike adhesion process 
proximally. Second segment clubshaped, with 2 knoblike adhesion 
processes on distal outer surface, anteriormost continuous with 
spikeshaped projection. Third segment continuous with clawlike 
terminal process, with node proximally bearing weakly sclerotized, 
spinelike projection; setulelike accessory process present at probable 
junction of segment and terminal process. Terminal process with 
secondary spine proximally. 
Mandible, maxillule, maxilla, postantennal process and postoral 
process similar to those of female. Maxilliped (fig. 13d) 2-segmented, 
situated posterior and medial to maxilla base. First segment strongly 
developed, with narrow, somewhat recurved proximal articulation 
process. Distal inner surface of first segment with serrated ridge 
forming adhesion process. Second segment incompletely separable 
from clawlike terminal process, bearing setalike accessory process 
from distal inner surface. 
Thoracic legs I-IV similar to those of female. Two major differences 
evident. Innermost terminal spine of second segment of exopodite of 
male first leg bifid (fig. 13e), female with simple spine. Spine on outer 
distal surface of second segment and spine on proximal outer surface 
of third segment of exopodite of male second thoracic leg (fig. 13f), 
with denticulations, not enlarged and hookshaped as in female. 
