COPEPODA FROM IFALUK ATOLL 337 



somite, distal borders of all abdominal somites fringed with spinules, 

 forming completely closed rows. Anal somite twice as mde as long, 

 with broad anal plate, fringed with spiniform hairs. Insertion of 

 fm-cal rami also bordered with spinules (fig. 134c). 



Furcal rami about twice as long as wide, cylindrical, length 35/i, 

 diameter 17.5)u. Distal margin of each ramus produced in distinct, 

 acutely pointed, obliquely upwardly directed spine (fig. 133/). 5 

 marginal setae and 1 appendicular seta on each ramus, placed close 

 together at distal border; appendicular seta inserts near internal distal 

 corner. Setae 1, 4, 5, and appendicular seta small, setae 2 and 3 

 lengthened and thickened, especially 2nd. In my specimen the furcal 

 setae are damaged. 



The whole carapace is covered with short hairs, each placed on 

 a slightly elevated knob. 



Antennules 6-segmented: 1st segment with smaU externally directed 

 spine and haired internal border; spme on 2nd segment very strong, 

 curved, externally directed; 3rd segment long; 4th short and with well- 

 shaped conical process, bearing aesthetasc and 2 setae. Setation 

 represented m figure 133^. 



Antenna with allobasis, carrying single internal seta, and unseg- 

 mented exopodite with 4 setae. Endopodite with 7 appendages, 5 

 of which are marginal setae (fig. 133A). 



Cutting edge of mandibular praecoxa with strong teeth. Palp 

 well developed, unsegmented, with 2 setae. 



Maxillular arthrite well developed, long, with 4 strong teeth and 

 some smaller setae that could not be observed clearly, but one was 

 found along proximal border of arthrite. Coxal endite well developed, 

 slender, with 3 setae. No basal endite, basipodite unsegmented, with 

 1 seta representing exite, 2 setae representing exopodite, and 2 apical 

 setae at place of endopodite (fig. 133^). 



I obtained no suitable preparation of the maxilla. 



Maxillipede (fig. 133j) of the usual, chelate type. Basis with 

 straight internal border and slight!}^ convex external margin, Endop- 

 odite unsegmented, slightly curved, without additional setae. 



Leg 1 (fig. 133a) with 3-segmented exopodite and endopodite. 

 Coxa and basis fairly big; basis with distinct socle bearing endopodite. 

 Exopodal segments of same length, 2nd without internal seta. 3rd 

 with total of 4 appendages, 2 of which are geniculate setae. Exopodite 

 reaches halfway along 1st endopodal segment, which is large, 4% times 

 as long as wide, internal border with spiniform hairs. 2nd and 3rd 

 endopodal segments indistinctly separate: 2nd with haired and 

 swollen external margin, 3rd with fine seta near fusion with 2nd, 

 claw-shaped; apex curved, pointed. 



