192 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



strong, with stout subterminal posterior spine. Gnathopod 2: coxal 

 plate narrowing below, corner rounded; segment 5 elongate with 

 numerous slender pectinate spines posterodistally ; segment 6 short, 

 slightly inflated, dactyl minute. 



Peraeopod 1: coxal angle blunt; segment 2 not broadened; segment 



4 expanding distally; segment 5: posterior lobe large, directed proxi- 

 mally, with circlet of 16 slender spines and 6 plumose setae; segment 

 6 with 10 spines and 5 plumose setae. Peraeopod 2: coxal plate 

 narrow, moderately deep, angles subquadrate; segment 2 short, 

 narrow; segment 4 short and very broad, especially distally; segment 



5 short and deep, posterior lobe with circlet of 8 slender spines and 

 5 plumose setae; segment 6 with 7 spines and 5 plumes. 



Peraeopod 3: posterior coxal lobe large, margin smooth; segment 

 2 shallow convex and slightly plumose behind. Segment 4 shallow, 

 very broad, posterior margin truncate, with 2 spines; segment 5 

 shallower but very wide, facial spines in 3 rows; segment 6 short, 

 linear, length less than width of segment 5, termmal spines long and 

 slender. Peraeopod 4 coxal plate nearly as broad, posterior margin 

 smooth; segment 2 relatively narrow, margin nearly straight, plumose; 

 segment 4 expanding distally, facial spines in 3 vertical rows, 2-6 

 per cluster; segment 5 trapezoidal, distal margin sharply convex; 

 segment 6 equal to width of 5, terminal spines slender, numerous. 

 Peraeopod 5: posterior coxal lobe broad, very elongate, rounded 

 behind; segment 2: posterior margin relatively small, lightly setose; 

 segment 4 with short posterior lobe, truncate posterior margin with 



1 spine group; segment 5 relatively long and narrow, posterior margin 

 with one prominent spine group; segment 6 about equal in length, 

 broad spatulate; marginal spines short and slender. Coxal gills 

 saclike, slender, and shortest posteriorly. Brood plates slender, moder- 

 ately long; those of gnathopod 2 and peraeopods 1 and 2 with 25-30 

 marginal setae; brood plate of peraeopod 3 a minute lobe with a few 

 marginal hairs. 



Pleosome side plate 3 deeply convex below, posterior spine fairly 

 strong; 4 groups of facial plumose setae, 4-8 per cluster. Pleopods 

 strong, peduncles very broad; inner rami with 12-13 segments, outer 

 with 15 segments. 



Uropod 1 small, peduncle slightly shorter than rami; inner ramus 

 expanding distally, with 3 groups of marginal setae, 2-3 per group; 

 outer ramus more slender and with marginal spines and setae. Uropod 



2 relatively large, rami and peduncle, strong subequal, richly setose, 

 some of which are plumose. Uropod 3 slightly shorter than uropod 2, 

 rami subequal, terminal segment of outer ramus small and slender; 

 ramal apices with spines and setae, some plumose. Telson short, 



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