COPEPODA FROM IFALUK ATOLL 85 



apparently composed of 2 fused segments. Near place of fusion 

 two fine setae insert. 



Leg 1 (fig. 26a) with strongly developed coxa and basis and 3- 

 segmented endopodites and exopodites. Coxa spinulose at external 

 border; basis with strong, external spine and slenderer internal spine; 

 internal margin spinulose. 1st and 2nd exopodal segments long and 

 styliform; 1st segment slightly longer than 2nd, external margin 

 spinulose, with spiniform seta near its end. 2nd segment with seta 

 at % of external margin. 3rd exopodal segment notably small, 

 almost completely telescoped into 2nd, bearing 4 curved spines and 

 fine seta. Endopodite styliform, 1st segment as long as 1st exopodal 

 segment, upper part of internal margin spinulose and with fine seta 

 at end of that margin. 2nd and 3rd endopodal segments small and 

 of equal size; 2nd with small internal seta, 3rd with 2 big claws. 



The details of legs 2 to 4 appear from figures 26b-d, the setal for- 

 mula, and the following notes. Setal formula: 



Leg 2 (fig. 266) with modified endopodite. 1st endopodal segment 

 slightly more than twice as long as broad, reaching half 2nd exopodal 

 segment, with 1 internal seta. External margin of 2nd endopodal 

 segment drawn out to a long point; segment itself about as long as 

 maximal width; point reaches beyond apex of exopodite and twice 

 as long as segment itself; 1 internal seta. 3rd endopodal segment 

 about half length of spiniform process, with 4 setae. 



Exopodite of leg 3 modified (fig. 26c). 1st exopodal segment with 

 distinct tooth halfway along external margin, in addition to spine at 

 end of margin, Spmes at external margin of segments 1, 2, and 3 of 

 exopodite of increased size, especiallj'" those on 3rd segment. Apical 

 spine on 3rd exopodal segment accompanied by seta, while 3 setae 

 along internal margin. 3 spines on anterior aspect of 2nd endopodal 

 segment. 2nd exopodal segment not lengthened, about IK times as 

 long as wide. 



Leg 4 with 3 spines on anterior aspect of 2nd endopodal segment 

 (fig. 26d). 



Leg 5 with greatly reduced baso-endopodite. Externally there is a 

 slightly produced part with a fine seta and some spinules; there are no 

 internal spines or setae. Exopodite 3 times as long as wide, cylindrical, 

 with 4, strong, marginal, almost apical, spiniform setae and an 

 extremely thin internal seta. Some dispersed spines along internal 

 and external borders (fig. 2Qe). 



