176 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



deep; segment 2 long, distally broadest; segment 3 short, bearing 

 calceolate 5-segmented flagellum terminally and 2-segmented ac- 

 cessory flagellum sub terminally. Antenna 2: lobe of peduncular 

 segment 4 diverging distally, segment 5 slender; flagellum of 4 seg- 

 ments, 1st not markedly wider. 



Upper lip with slightly bi-indented apex. Lower lip: inner lobes 

 distally broad. Mandibular lacinia and incisor unicuspate; 3 ser- 

 rated accessory blades; palp segment 3 with 10 short proximal comb 

 spines and 11 slender apical spines. Maxilla 1: inner plate small, 8 

 slender, simple marginal setae; accessory lobe vestigial. Maxilla 2: 

 outer plate rounding distally, inner margin with about 12 stiff setae 

 proximally and 4 plumes distally. Maxilliped: palp segment 2 

 broad lobate distally; segment 3 arched, widest distally. 



Gnathopod 1 : posterior angle of coxa with 5 plumose setae ; segment 

 5 slender, about % segment 2; segment 6 strong, slightly shorter, 

 dactyl short, nail terminal. Gnathopod 2: posterior angle of coxa 

 with 7 plimiose setae; segment 2 sinuous, elongate ; segment 5 with 4-5 

 clusters of slender comb spines ventrodistally ; segment 6 tinnid, 

 slightly arched. 



Peraeopod 1 posterior coxal angle acute, concave posterior margin 

 with 7 plumes; segment 4 slender, anterior margin bare; segment 5: 

 posterior lobe with about 10 slender spines and 6 plumose setae; 

 segment 6 with 15 slender spines. Peraeopod 2: coxal plate pro- 

 duced posteriorly to subacute lobe, lower margin slightly convex; 

 segment 4 strong, stout; anterior margin bare; segment 5 shallow 

 behind, circlet of 8 spines; segment 6 with 14 marginal spines. 



Peraeopod 3: posterior coxal lobe large and deep; segment 2 nar- 

 rowing distally; posterior margin bare; segment 4 not broader than 

 segment 5; segment 6 linear, marginal spines elongate. Peraeopod 4: 

 posterior coxal lobe large, sparsely spinose below; segment 2 posteriorly 

 nearly bare; segment 4 expanded behind a margin convex, spines 

 slender; segment 5 subrectangular, distal margin with pronounced 

 U-shaped incision; segment 6 slender, nearly as long as segment 5. 

 Peraeopod 5: coxal plate rounded behind, margin with a few stout 

 spines; segment 2 extremely broad, posterior margin nearly smooth, 

 not proximally incised; segment 4 subrectangular, posterior margin 

 broad, nearly truncate, with 3-4 stout spines; segment 5 narrow, 

 posterior margin with 1 spine group; segment 6 broadest proximally, 

 length about equal to segment 5 ; marginal spines long and numerous. 

 Coxal gills slender, smallest posteriorly. Anterior 3 brood plates 

 slender, 4th a minute lobe. 



Pleosome side plate 3 : entire margin smoothly rounded ; lateral face 

 with scattered clusters and singly inserted plumes. Pleopods: outer 

 rami 14-17 segmented, inner 10-segmented. Uropod 1: peduncle 



