NO. 3656 COPEPODS—LEWIS 75 
fine membrane on distal half of outer surface, distal surface bearing 2 
saber-shaped processes, innermost approximately one and one-fourth 
times the length of outermost, both fringed with fine membrane. 
Mazxilliped (fig. 20h) 2-segmented, situated posterior and slightly 
medial to maxilla base. First segment strongly developed, irregular in 
outline; widest medially, proximal end narrow, distal approximately 
half the greatest width; segment with socket-like shelf on medial inner 
surface, receiving distal end of second segment terminal process when 
segment flexed. Second segment distinct from clawlike terminal 
process, bearing setule-like accessory process on distal inner surface. 
Sternal furea (fig. 292) situated between and slightly posterior to 
maxilliped bases, bifurcations flattened anteroposteriorly, lobate in 
outline. 
TABLE 12.—Armature of thoracic legs I-IV of the female of Caligus laticaudus 
Shiino, 1960 
| 
Inter- Protopodite Exopodite Endopodite 
Leg | Surface podal 
Plate 
1 2 1 2 3 1 2 3 
I | Outer ss, p rh h, 2H, p’ 
Inner p c 3P 
II | Outer m, p m,dmH| H Jays 1SIGKA) c (ed i 
m 
Inner GIP m, 5, Cee Oy 5P Pp Cree alte or 
III | Outer mee m, s Cape Cc, 3p’ c c, 3P 
m 
Inner P,s,m,s H P 4P P 3P 
peas eres ens | | ee Lene meee, ——— 
| 
IV | Outer p fm, mH | fm, mH | fm, 3m | 
Thoracic legs I-III biramous although endopodite strongly reduced 
in first leg; fourth thoracic leg uniramous, 4-segmented. For details 
of legs and armature, see figures 30a—/ and table 12. 
Discusssion.—The Eniwetok specimen differs from Shiino’s 
original description in several points: 
1. There is a setule on the inner surface of the protopodite of the 
first thoracic leg that is not listed or figured in Shiino’s publication. 
2. The sternal furca appears broader than that shown by Shiino for 
C. laticaudus although the angle from which the drawing was made may 
at least partially explain this. 
3. The total length of the Eniwetok specimen is smaller than that 
listed by Shiino (3.51 mm) although Pillai (1961) lists 2.6 mm as the 
length of his female specimen(s?). The difference in length between 
the Eniwetok specimen and Shiino’s is presumed to be, at least in part, 
due to the possible immature adult condition of the Eniwetok specimen, 
