342 U.S. NATIONAL MUSEUM BULLETIN 23 6 



Antennules (jBg. 131/) short, % length of cephalic somite, sub- 

 chirocerate, with prominent, outwardly directed, cm-ved hook on 2nd 

 segment. Segment 4 big and strongly swollen, with small conical 

 process bearing aesthetasc and 2 setae. Apical 3 segments small, 

 jointing indistinct; the complex articulates with 4th segment. Seta- 

 tion represented in figure 131/. 



Antennal allobasis without setae; exopodite unsegmented, short, 

 with 4 strong setae. Endopodite with 7 appendages, 5 of which are 

 marginal setae (fig. 131^). 



Cutting edge of mandibular praecoxa with 4 blunt, plate-shaped 

 teeth. Palp small, unsegmented, with 4 setae and no trace of endop- 

 odite nor exopodite (fig. 131^). 



Maxillule (fig. 131^) with well-developed, squarish arthrite, bearing 

 4 marginal teeth, 2 additional setae, and 1 basal seta. Coxal endite 

 small, with 3 setae. No basal endite. Endopodite fused to basi- 

 podite, with 4 apical setae and isolated seta at external margin. 

 Exopodite (or epipodite) small, styliform, with 2 small setae. 



Maxilla (fig. 131j) with praecoxal, coxal and basal endites of equal 

 length. Praecoxal endite with 2 spinulose setae, coxal endite with 

 2 nude setae, basal endite with coalescent, strong spine and additional 

 seta. Endopodite completely reduced, represented by 2 setae inserting 

 on basal endite. 



Maxillipede (fig. 131^) of usual, chelate type. Coxa styliform, 

 without seta. Basis with straight internal and swollen external mar- 

 gin with fine seta. Endopodite composed of 2 indistinctly separated 

 segments, forming pointed, curved digit, slightly longer than basis. 

 A fine seta inserts at line of fusion. 



Leg 1 (fig. 135a) fauly long, coxa and basis elongate. Coxa with 

 haired external border and hahed tubercle at internal margin. Basis 

 with strong, plumose, external seta, endopodite placed on big socle. 

 Exopodite small, half length of 1st endopodal segment, 2-segmented, 

 without internal seta. 2nd exopodal segment with 5 appendages. 

 1st endopodal segment styliform, 5 times as long as broad, internal 

 margin haired, without setae. 2nd and 3rd endopodal segments fused 

 to form slender, pointed digit with curved apex; fine seta occurs near 

 line of fusion. 



Leg 2 (fig. 1356) with strongly haired external tubercle at coxa. 

 Basis with setose external seta. Exopodite 3-segmented, 1st segment 

 without internal seta, 2nd with internal seta, 3rd with internal seta, 

 apical spine and seta, and 3 outer edge spines. External margin of 1st 

 and 2nd segments strongly spinulose. Endopodite 2-segmented, 1st 

 segment styliform, without setae. Segment 2 with 2 internal and 2 

 apical setae. Inferior internal seta modified, basal part a thick rod, 

 terminating in hook. Internal margin of rod haired, hairs gradually 



