200 University of California Publications. [ ZooLocy 
Head usually without hooks on side; one pair of dorsal eye 
lenses, larger in the male than in the female; rostral hooks 
strongly chitinized. Cephalothorax of 5 segments, ending in 
points laterally, more strongly developed on right side in the 
male Abdomen of female with 2 or 3 segments, of male 
with 5, sometimes asymmetrical in the female. Anterior 
antennae of female 23-jointed; terminal section of grasping 
antenna (the right) of male 4-jointed. Mandibular blade with 
5-7 hooked, pointed teeth. Second basal of maxilla bent toward 
outside, about twice as long as the second lobe of the inner 
margin; anterior maxilliped stunted and provided with strong 
hooked bristles especially on the distal half; posterior maxilliped 
with 4-jointed inner ramus. Inner ramus of swimming feet 
2-jointed, outer ramus 3-jointed; fifth foot of female on each 
side with 2-jointed basal portion, rami 1-jointed, though the 
inner ramus may be rudimentary. Fifth foot of male 4-jointed 
on each side, right without inner ramus, left at times with rudi 
mentary inner ramus. The two terminal joints of the right foot 
form a powerful forceps. 
1. Labidocera trispinosa n.sp. 
2 Cephalothorax symmetrical, evenly rounded in front; 
erest, and hooks on side of head absent; rostrum bifid, very 
long; last thoracic segment produced on each side into sharp 
points (cf. fig. 48a. left side). Abdomen with 3 segments, 
genital longer than the last two, asymmetrical, with a prominent 
blunt wing-like process on the right side (fig. 48d); middle 
abdominal segment with a knob-like projection on the left in 
front. Furea symmetrical, about 3 times as long as_ broad. 
Anterior antennae extending back to the posterior border of 
fourth thoracic segment. Fifth pair of feet symmetrical (fig. 
489), outer ramus ending in two teeth, the inner one twice 
as long as the outer; inner ramus about one-half as long as the 
outer, articulating with basal; outer ramus longer than the first 
and second basals together. 
& Eye lenses larger, and more nearly contiguous (fig. 48a). 
Last thoracic segment on right side with a long slender spine, 
a 
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