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PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
to maxilliped bases, tines angled outward slightly, bluntly pointed 
distally. Basal region of furca with lateral projection on each side, 
length of projections variable although projection on left usually 
longer than that on right. 
Thoracic legs I-III biramous although endopodite of first leg 
rudimentary, fourth thoracic leg uniramous, 4-segmented. For nature 
of appendages and armature, see figures 18a-j and table 7. 
Discussion.—The identification of the Eniwetok specimens as 
L. plectropomi is questioned for three reasons: 
1. The incomplete original description makes identification difficult. 
2. The rami of the sternal furca of the Eniwetok specimens are 
thinner than those figured for L. plectropomt. 
3. The membrane on the inner 2 terminal spines on the second 
segment of the exopodite of the first thoracic leg is figured as reaching 
TABLE 7.—Armature of thoracic legs I-IV of the female and male of Lepeophtheirus 
plectropomi? Nunes-Ruivo and Fourmanoir, 1956 
Inter- Protopodite Exopodite Endopodite 
Leg| Sur- podal 
face plate 
1 2 1 2 3 1 2 3 
I | Outer S,p rh 3mH,P 
Inner 3P 
II | Outer m,p m,mH mH 2mH,Q,2P c c ¢,3P 
m 
Inner S;P m,s (ope c,P C33; 12) (A c,3P 
III | Outer* m,s,P 3s8,H (0 c,3p’,P c ¢,3P 
m 
Inner s,P,m,s le c,P ¢,3P 12 ¢,3P 
IV | Outer p fh d,f d,3fH 
*Several hairlike processes on protopodite not included. 
the distal end of the spines (fig. 5b in Nunes-Ruivo and Fourmanoir, 
1956). The condition in the Eniwetok specimens differs, as shown in 
figures 18), c. 
Both Nunes-Ruivo and Fourmanoir (1956) and Kabata (1966) 
compare L. plectropomi with L. dissimulatus Wilson (1905). The two 
species are similar in general body composition but exhibit appendage 
and other body characteristics that enable them to be readily 
separated. Two of these characteristics are: 
1. The female of L. plectropomi possesses a short, spinelike pro- 
jection as part of the fifth leg. The female of L. dissimulatus does not; 
the fifth leg of this species includes a setule-bearing lobe or node but 
not a spine. 
