NO. 3656 COPEPODS—LEWIS 19 
teriorly, tapered slightly posteriorly; process-bearing nodules present 
although longitudinal row extending posterolaterally, consisting of 4 
nodules, not 3 as in female. Fifth leg (fig. 9/) situated on lateral 
ventral surface, consisting of 5 lightly plumose setules originating 
from slight swelling. Sixth leg (fig. 9g) lappet-shaped, situated on 
lateral posterior surface of segment, bearing 2 lightly plumose setules. 
Abdomen 1-segmented, short; narrow anteriorly, flared sharply 
posteriorly, posterior surface as in female. Caudal rami as in female. 
Female and male antennule (fig. 7g) 2-segmented, situated on lateral 
anterior ventral surface of cephalothorax and adjacent frontal region. 
Second segment approximately nine-tenths the length of first; first 
broader proximally than distally, lateral margins irregular; anterior 
ventral surface of first segment bearing approximately 28 lightly 
plumose setae and setules. Second segment rodlike, medial posterior 
surface with one naked setule, distal surface with 12 naked setules. 
Female antenna (fig. 8a) 3-segmented, situated posterior and medial 
to antennule base. First segment subrectangular, attached to heavily 
sclerotized padlike projection of cephalothorax. Second segment sub- 
rectangular, slightly longer than first segment. Third segment in- 
completely fused to clawlike terminal process, with setule-like acces- 
sory process proximally. Segments of male antenna (fig. 8b) similar 
to those of female although second with slight indication of adhesion 
surfaces (not shown in figure), terminal process of third segment with 
accessory claw proximally, segment with second accessory process at. 
indistinct junction with terminal process. 
Female and male mandible (fig. 8a) 4-parted, distalmost part 
flattened, inner margin with 10-12 denticulations. Female and male 
postantennal process (figs. 8a, 6) situated posterior and slightly lateral 
to antenna base, consisting of 3 minute nodules, each with one or more 
hairlike processes. Female and male postoral process consisting of long, 
spatulate spine, male spine with light, spinelike accessory process 
distally. Female and male maxillule (fig. 8a) situated immediately 
lateral to mouth cone base, consisting of lobate projection, forming 
base of postoral process, bearing nodule, with seta and 2 setules, on 
proximal outer surface. Projection with slight adhesion surface on 
distal half of outer surface. Female and male maxilla (fig. 8c) 2-seg- 
mented, situated lateral and slightly posterior to maxillule. Segment 
lengths about equal, first more strongly developed, second rodlike, 
with small membrane on distal inner surface and 2 saber-shaped 
terminal processes. Innermost terminal process approximately one 
and one-half times the length of outermost, both with fine membranes, 
distal portion of membranes forming denticulations on innermost 
terminal process. 
