368 U.S. NATIONAL MUSEUM BULLETIN 236 



Antennules slender, about as long as cephalic somite, 6-segmented: 

 segment 2 with outwardly directed, strong hook; external margin of 

 segment 1 strongly haired; segment 4 with conical process, concealing 

 segment 5, bearing aesthetasc and 2 setae. Setation represented in 

 figure 146a. 



Antenna (fig. 145/) with small, unsegmented exopodite, bearing 4 

 strong setae. Internal margin of aliobasis haired, no seta. Endop- 

 odite slender, with 2 spines and 6 marginal setae, 3 of which are hooked. 



No good preparations of the mandible and the maxilla were obtained. 



Maxillule (fig. 145^) with elongated arthrite, bearing 6 spiniform 

 setae and fine basal seta. There is one endite, presumably the basal, 

 bearing 2 fine setae. Basipodite elongate, with 3 setae. Endopodite 

 reduced, with 2 setae. Exopodite styliform, small, with 2 fine setae. 



Maxillipede (fig. 1466) strongly developed, especially endopodite. 

 Coxa lengthened, with single seta. Basis moderately swollen, with 

 convex external margin and haired swelling at internal margin. 

 Endopodite represented by strongly developed, hooked digit of very 

 characteristic shape (cf. fig, 1466). 



Leg 1 (fig. 145a) slender and long; coxa with haired external margin 

 and haired swelling at internal margin. Basis very long and slender, 

 with fine external seta at % length from apex; internal margin haired. 

 Exopodite extremely short, 2-segmented, segment 2 twice as long as 

 segment 1, with total of 5 appendages. 1st endopodal segment 

 styliform, 6 times as long as wide. 2nd and 3rd endopodal segments 

 fused to form curved, slender digit; place of fusion marked by a fine 

 seta. 



The details of legs 2 to 4 appear in figures I45b-d; exopodites 

 3-segmented, endopodites 2-segmented. The setal formula is: 



endopodite exopodite 



leg 2 0.120 0.1.122 



leg 3 0.220 0.1.222 



leg 4 0.120 0.1.222 



Leg 2 (fig. 1456). Endopodite and exopodite of nearly equal 

 length; internal seta on 2nd exopodal segment very small. 



Leg 3 (fig. 145c). Endopodite reaches middle of 3rd exopodal 

 segment. Internal seta at 2nd exopodal segment fine and long. 



Leg 4 (fig. 145c?). Endopodite small, as long as 1st exopodal 

 segment. Internal seta of 2nd exopodal segment normally 

 developed. 



Leg 5 (fig. 145e) with well-developed baso-endopodite, reaching 

 % length of exopodite, with 4 marginal setae. Exopodite more or 

 less triangular, with 3 marginal setae; internal and external margins 

 haired. External lobe well developed, with strong seta. 



