154 PROCEEDINGS OF THE NATIONAL MUSEUM 



Legs 1-4: Both basal segments of leg 1 with inner seta; only first 

 segment of legs 2-4 with inner seta. First two segments of exopod of 

 legs 1-4 with outer spine and inner seta; segment 1 of endopod with 

 inner seta, segment 2 with two inner setae. 



Armature of third segments of both rami as follows (sp= spine; 

 s=seta): 



Leg 1 (fig. 9) with several distinctive modifications. Outer spines 

 of exopod with marginal flanges and tipped with a hair. Distad to 

 the spine a flattened process; the processes of segments 1 and 2 with 

 serrate edges; that of segment 1 very small; that of segment 2 larger, 

 about half the length of the outer spine, between it and the spine an 

 unarmed spiniform process; the process of segment 3 extremely 

 small, nonserrate and placed at the outer distal corner of the segment. 

 Inner apical spine of third segment of exopod subequal in length to 

 segments 2+3. Seta of basipod segment 2 long and characteristically 

 cm'ved over the first two endopod segments. Distal outer portion of 

 endopod segment 1 with an enlarged, partially separated, lobelike 

 process or extension, densely setose on its anterior side. Segment 

 3 of endopod reduced in width, its terminal outer margin extended 

 into spinous process. 



Excepting the seta of endopod 1 of leg 1, all the setae of legs 1-5 

 jointed, usually below the middle. The proximal portion of these 

 modified setae appear stiff and rodlike, and are sparsely plumose; 

 the terminal flexible portion densely plumose. Spines of outer margins 

 of exopods of legs 2 and 3 bladelilve and unarmed (fig. 12), those of 

 segments 1 and 2 elongate, reaching to near the base of the next 

 spine or beyond, set into deeply defined sockets. The distal outer 

 spine of segment 3 set in nearly terminal position with a prominent 

 segmental process between it and the longer inner apical spine; 

 inner spine about as long as its segment and unarmed. Spines of 

 leg 4 (fig. 13) differing from those of legs 2 and 3 in having marginal 

 flanges; the flange of the long inner apical spine of segment 3 armed 

 with marginal hahs; near its distal fourth, these hairs cross over 

 the surface of the spine to the edge of the inner margin. 



Leg 5 (fig. 6): Basipod segments without inner setae; segment 2 

 with small outer spinous process and submarginally placed seta, 

 usually inwardly dhected; surface of these segments with groups 



