200 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



Description. — Female, 5.5-8.0 mm. Head width about twice the 

 length, lateral margins evenly convex, rostrmn stout, blunt conical, 

 eyes very small, weakly pigmented, just inside margin of antennal 

 sinus. 



Antenna 1: peduncular segment 1 very deep, with numerous 

 plumose setae; segment 2 anterior margin with numerous long distally 

 plumose setae; segment 3 short, linear; fiageUum 6-segmented, 

 calceolate, elongate; accessory flagellum of 2 long subequal segments. 

 Antenna 2 : peduncular segment 4 very deeply lobed behind, margin 

 richly plumose, face with 2 rows of plumose bladeUke setae; segment 

 5 short and broad; flagellum 7-segm exited, 1st longest, proximal 



4 segments with posterior plumose setae. 



Upper lip broad, apex almost bare. Lower lip: inner lobes broad- 

 ening distally, apices subtruncate, pilose. Mandible: incisor bifid; 

 lacinia short, slender; accessory blades 7, molar process large, 2 supra- 

 molar blades; palp segment 2 broadest proximally, 3rd uniformly 

 slender, 18 spines in comb row, 12-13 slender apical spines. Maxilla 

 1: inner plate small with 10 setae; outer plate with 12 slender spine 

 teeth; palp short, with simple marginal and terminal setae; accessory 

 lobe moderately developed. Maxilla 2: outer plate very broad, 

 outer margin short pilose, inner margin proximally with 14 slender 

 pectinate spines and distally with about 20 plumose setae; inner 

 lobe narrow, facial row strong, sinuous. Maxilliped: outer plate 

 much broader than inner, palp rather slender, segment 2 produced 

 distally almost to long transverse margin of geniculate segment 3; 

 terminal setae very long, many bifid at tip or minutely pectinate. 



Gnathopod 1: coxal angle acute, with about 8 long plumose setae; 

 segment 2: posterior margin simply setose; segment 5 very strong 

 and inflated, lower margin richly setose; segment 6 slender, convex 

 anterior margin with several clusters of long club-tipped setae; 

 dactyl short, simple. Gnathopod 2: coxal angle acute, rounded, with 

 about 12 plumose setae; segment 2 slender, gently sinuous; segment 



5 slightly inflated, lower margin distally with about 4 clusters of 

 pectinate spines; segment 6 slender, gently arched, a few anterior 

 setae plumose. 



Peraeopod 1: coxal plate semilunate, posterior angle very acute, 

 posterior margin with more than 12 plumose setae; segment 2 linear; 

 segment 4: subparallel margins with several long plumose setae; 

 segments 5 and 6 with about 10 slender marginal spines and 4 plumose 

 setae. Peraeopod 2: coxal plate broad and deep, posterior sinus 

 shallow; segment 2 short, linear; segment 4: distally expanding 

 margins with several plumose setae; segments 5 and 6 with 9-10 

 slender spines and 4-5 plumose setae. Peraeopod 3: posterior coxal 

 lobe the larger, margin distally setose; segment 2: smoothly convex 



