386 U.S. NATIONAL MUSEUM BULLETIN 236 



diameter at base, narrowing distally. Insertion of setae on dorso- 

 caudal part of each ramus, with the result that small part of furcal 

 ramus is free, which part is slightly backwardly produced and carries 

 a small spinule. Each ramus has 5 marginal setae and 1 appendicular 

 seta. Setae 2 and 3 are longer than remaining setae, and are curved 

 and swollen at base. Furcal structure appears best in figure l5Qd. 

 No hairs or spinules along distal margins of any of somites. 



Antennules longer than cephalic somite, 8-segmented. Segment 



4 long, with distinct conical process bearing aesthetasc and 2 setae. 

 Setation represented in figure 151g. 



Antenna (fig. 151/) with allobasis and internal seta. Exopodite 

 long, segmentation not visible, with 4 strong marginal setae and 

 indication of small spine near apical seta. Endopodite short, with 

 7 marginal and 2 appendicular setae. Of marginal setae, 1 curved, 



2 geniculate, 1 geniculate and spatulate, and 3 spatulate. Internal 

 margin of endopodite spinulose. 



Mandible (fig. 151^) with big praecoxal cutting edge, bearing 6 

 acute teeth and basal seta. Palp well developed, composed of 

 large basipodite with 3 setae, one of which spinulose. Endopodite 

 well developed, with 6 setae, one of which spinulose. Exopodite 

 small, styliform, with 2 strongly spinulose setae. No epipodite. 



Maxillule (fig. 151^) with short arthrite, bearing 4 spatulate and 



3 normal setae. Coxal endite small, with 3 setae. Basal endite 

 slightly longer, with 4 setae, one of which spatulate. Endopodite 

 small, unsegmented, with 4 setae. Exopodite also small, with 3 

 strong, spinulose setae. 



Maxilla (fig. 151i) with total of 4 endites: 2 small praecoxal endites, 

 each with 2 setae; coxal endite also small, with 2 setae; basal endite 

 weU developed, coalescent with big spine, bearing additional seta. 

 Endopodite distinct, unsegmented, with 4 setae, one of which fairly 

 strong. 



Maxillipede (fig. 151j) chelate, coxa short, without setae. Basis 

 moderately swollen, internal and external margins slightly convex. 

 Internal margin strongly spinulose and, in addition, with 3 setae. 

 Endopodite composed of 2 fused segments, forming curved digit, 

 bearing 2 additional setae near line of fusion. 



Leg 1 (fig. 150c) very strongly developed, especially endopodite. 

 Coxa big, with some spinules and seta at external margin. Basis 

 with strong, spinulose, external seta and fine seta on socle supporting 

 endopodite. Exopodite 3-segmented, segments of equal length, 

 2nd without internal seta; 3rd with total of 5 appendages, one of 

 which is haired seta. 1st endopodal segment twice as long as exopodite, 



5 times as long as wide, with subapical seta at internal margin. 

 2nd endopodal segment strongly swollen, coalescent with apical 



