184 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



slender, facial row gently sinuous. Maxilliped: inner plate small, 

 nearly uniformly narrow, about 10 inner marginal blades, outer 

 plate much longer, broader, and apex blunt rounded; palp segment 

 2 short and broad, expanding distally; segment 3 strongly geniculate, 

 width exceeding length, apical angle acute. 



Gnathopod 1 : coxal plate short and semilunate, posterior angle 

 blunt, 7-setose; segment 2 broadened, both margins convex, anterior 

 with a few plumes, posterior with simple setae; segment 5 powerful, 

 upper margin much longer than lower; segment 6 tumid proximally, 

 anterior margin convex; nail of dactyl stout, long. Gnathopod 2 

 similar, longer, coxa with about 10 posterolateral plumes; segment 2 

 long, setose behind; segment 6 longer than 5, more slender and strongly 

 arched than in gnathopod 1, dactyl prominent. 



Peraeopod 1: coxal plate strongly semilunate, acute angle with 

 about 8 plumes; segment 2 broad, heavily plumose behind; segment 4: 

 margins plumose; segment 5 with deep posterior lobe, broad circlet of 

 12 short slender spines and 12 plumose setae; segment 6 broad, spatu- 

 late, more than 20 marginal spines, innermost longest. Peraeopod 2: 

 coxal plate very deep, smoothly rounding below, posterior lobe very 

 short, segment 2 richly plumose behind; segment 4 expanding dis- 

 tally, margins plumose; segment 5 short, deep, lobe narrow, circlet of 

 10 spines and 6 setae; seg-ment 6 elliptical, margin with 12 spines and 

 8 plumes. Peraeopod 3: coxa very broad, hindlobe with steep setose 

 posterior margin; segment 2 suborbicular, margin finely setose prox- 

 imally; segment 4 broader than deep, lobe rounding behind, margin 

 with 4-5 spine groups; segment 5 equally broad, very short; segment 

 6 long, tapering, anterior and terminal spines long and slender. 

 Peraeopod 4: posterior coxal lobe large, oblique, margin rounding below, 

 with numerous short setae; segment 2: posterior margin distally bare; 

 segment 4 long and very broad, posterior margin shallowly convex, 

 with about 12 spines, facial spine clusters in 5 rows; segment 5 much 

 narrower, distal margin short, slightly oblique; segment 6 slender, 

 arched and very long, with 5-6 paired groups of posterior spines. 

 Peraeopod 5: coxal plate shallow, attenuated posteriorly in prominent, 

 acutely pointed lobe; segment 2 extremely broad, anterior margin 

 much longer than posterior, which is nearly bare except for proximal 

 short setae; segment 4: posterior lobe narrow, elongate, proximal, and 

 posterior borders mergmg into virtually continuous oblique margin, 

 one spine group at "angle"; segment 5 broad and deep, posterior 

 margin convex, 2-spinose, nearly as long as anterior margin; segment 

 6 broad, tapering distally, distinctly longer than segment 5, margins 

 with 7-8 spine clusters. Gills relatively long and slender, largest ante- 

 riorly. Brood plates on peraeopods 1 and 2 very large, 40-60 marginal 



