COPEPODA FROM IFALUK ATOLL 165 



Abdomen 4-segmentcd by fusion of somites 4 and 5; future division 

 of this somite already indicated. Abdominal somites 1 and 2 of equal 

 length, 3rd slightly shorter, 4th + 5th 1^ times length of 3rd. Genital 

 flaps already indicated at distal end of 1st abdominal somite by 3 

 setae on each side (fig. 61g). Spinules occur on ventrolateral surfaces 

 of 2nd and 3rd abdominal somite. Furcal rami divergent, 1% times 

 as long as wide, setation as in E. andrewi andrewi. Abdominal 

 somites and furca completely covered with small, prickly hairs, partic- 

 ularly visible on lateral walls. 



Antennule 7-segmented, setation represented in figure 60c. Segment 



1 with 2 rows of spinules; 4th segment with moderately long conical 

 process, bearing aesthetasc and 2 setae. 



Antenna (fig. 61a) with 1-segmented exopodite, bearing 5 setae: 2 

 on basal part (only 1 in Sewell's description of this stage) and 3 at 

 apical part. No indication of future division of appendage. Endopo- 

 dite with spinules along internal margin, gradually increasing in size 

 distally. 



Cutting edge of mandibular praecoxa with 5 moderately developed 

 teeth and basal seta. Palp with well-developed endopodite, bearing 

 5 setae, and small exopodite with 2 setae. There are, in addition, 

 two setae on the basipodite (fig. 616). 



Arthrite of maxillular praecoxa well developed. 5 weak, spinelike 

 teeth and apical seta and basal seta. Coxal endite present but small, 

 usually covered completely by better-developed basal endite, carrying 



2 setae. This coxal endite is not mentioned in the descriptions of any 

 species of this genus, yet it is distinctly present on both sides in my 

 specimen. Basal endite broad, with 4 setae. 2 setae on basipodite; 

 exopodite and endopodite small, with 2 and 4 setae respectively. No 

 trace of an epipodite (fig. 61c). 



Maxilla with 4 endites: 2 praecoxal, each with 2 setae, long coxal 

 endite with 3 short setae, and notably strong basal endite. The 

 latter bears a particularly strong, short spine, contiguous with the 

 endite, and 2 fine flanking setae. A spinulose seta at base of endite 

 represents the rudiment of the endopodite (fig. 61c?). 



Maxiflipede chelate, coxa with 2 subapical setae. Basis with 

 straight, spinulose internal border; external border moderately 

 swollen. Endopodite composed of 2 segments, forming a slightly 

 curved, pointed digit. A small seta occurs at the line of fusion of both 

 segments (fig. 61^). 



Leg 1 (fig. 60c?) with strongly developed coxa and basis. Coxa with 

 external spinulose swelling, basis with strong internal and external 

 spines. Exopodite 3-segmented, endopodite 2-segmented. 2nd 

 exopodal segment twice as long as 1st, with internal seta. 3rd exopodal 

 segment small, with total of 4 appendages. 1st endopodal segment 



