216 U.S. NATIONAL MUSEUM BULLETIN 23 & 



and setae 1, 4, and 5 fine; setae 2 and 3 strong and lengthened, espe- 

 cially 2nd, which reaches body length. Both 2nd and 3rd setae are 

 swoUen basally; in 2nd seta the swollen part is very prominent and 

 lengthened. 



Antennules (fig. 83a) subchirocerate, 9-segmented, with hinge 

 between 5th and 6th segments. Segment 4 swollen, big, with strong 

 cylindrical process, bearing aesthetasc and 2 setae; another aesthetasc 

 on segment 3. Segments 7 to 9 small. Setation represented in 

 figure 83a. 



Antenna (fig. 836) with allobasis, bearing internal seta, and 3-seg- 

 mented exopodite, with and 4 setae respectively. Endopodite 

 large, with 7 setiform spines, 4 of which are geniculate, and some 

 spinules. 



Mandible (fig. 83c) with strongly developed praecoxa; 5 teeth at 

 cutting edge strongly chitmized; in addition there is a basal seta. 

 Palp well developed, basipodite with 3 marginal setae. Endopodite 

 well developed, 2-segmented, bearing 1 and 4 setae respectively. 

 Exopodite small, jointing indistinct, with strongly spinulose basal 

 seta and 3 apical setae. 



Maxillule (fig. 83d) wdth well-developed praecoxal arthrite, carry- 

 ing 8 spmiform setae. Coxa and basis with distinct endite, each 

 with 3 setae. Endopodite small, fused to basipodite, with 4 setae. 

 Exopodite present, small, with 2 setae. 



Maxilla (fig. 84:d) with 2 praecoxal and 2 basal endites, each with 

 2 setae. Basal endite slightly stronger developed, with large, curved 

 spine, contiguous with endite. In addition there are 2 setae near 

 insertion of big spine on basal endite, and 1 on basal part of endite. 

 Endopodite represented by a small lobe bearing 4 setae. 



Maxillipede (fig. 83d) chelate, basis only slightly swollen, with 

 row of spiniform hairs and 2 setae along internal margin. Endopodite 

 unsegmented, forming curved claw, as long as basis, tapering into 

 fine, curved point; endopodite carries two setae near base. 



Leg 1 (fig. 84a) with spinulose trabecle at external border of coxa. 

 Basis with strong, curved external marginal spine, at internal border 

 with protruding lamella, at base of which there is a spine. Insertion 

 of endopodite on basis bordered with spinules. Endopodite and 

 exopodite 3-segmented. 2nd exopodal segment elongate, twice as 

 long as broad and longer than 1st exopodal segment, with internal 

 seta. Both segments with external marginal spine and marginal 

 spinules. 3rd exopodal segment small, with total of 5 appendages. 

 1st endopodal segment 6 times as long as broad, twice as long as 

 whole exopodite, internal margin spinulose and with subapical seta. 

 2nd and 3rd endopodal segments very small, 3rd with 2 strong, 

 dagger-shaped spines of unequal size and a small seta. 



