4 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
innermost distal one, which has a row of hairs along inner edge. A 
few surficial hairs on ramus. 
Dorsal surface of prosome and urosome with minute hairs. Ratio 
of length of prosome to that of urosome 1.9:1. 
Most ovigerous females observed carrying clusters of eggs, as in 
figure 1, rather than complete sacs; egg sacs delicate and easily broken 
in preserved specimens. One of the few intact egg sacs (fig. 5) 473y x 
180y, elongated, reaching nearly to ends of ramal setae, with each 
egg about 50u-55y in diameter. 
Rostral area (fig. 6) broadly rounded posteroventrally. 
First antenna (fig. 7) 7-segmented, 3604 in length, with third 
segment showing ventrally a proximal sclerotized area suggesting an 
intercalary segment. Lengths of segments: 39y (66u along anterior 
margin), 98y, 26y, 50u, 544, 374, and 28y respectively. Formula for 
armature: 4, 13, 6,3, 4-+1 aesthete, 2+1 aesthete, and 7+1 aesthete. 
All setae naked except for 2 delicately plumose on last segment. 
Second antenna (fig. 8) 4-segmented, with last segment moderately 
elongated, 91u along its outer edge, 52u along its inner edge, and 
26u wide. Each of first 2 segments with a small inner seta and surficial 
spinules as indicated in the figure, third segment with 3 setae (2 
subequal and much longer than third), and last segment with 7 
elements: 5 short hyaline elements and 2 long slightly unequal 
recurved claws 101u and 91y (measured along greatest axis). All 
setae naked. 
Labrum (fig. 9) with 2 relatively short broadly rounded postero- 
ventral lobes. 
Mandible (fig. 10) with basal region distal to constriction bearing 
on its convex margin a row of spinules followed by a serrated fringe 
and on its concave margin a row of slender spinules; flagellum elon- 
gated with lateral spinules. Paragnath (fig. 11) a small hairy lobe. 
First maxilla (fig. 12) an elongated segment bearing 3 terminal setae. 
Second maxilla (fig. 13) 2-segmented, large first segment unarmed, 
second segment with a small setule on proximal outer margin, a 
surficial posterior seta barbed along one edge, an inner distal spine 
with prominent lateral spinules, and the segment produced distally 
to form a lash with dentiform spines along one edge proximally and 
fine bilateral spinulation distally. Maxilliped (fig. 14) 3-segmented, 
first segment with surficial spinules, second with 2 unequal barbed 
setae and an inner marginal row of small spinules, and third with 2 
terminal spiniform barbed setae (producing a bifurcated appearance) 
and a naked setule. (Articulations of these 2 setae obscure, with inner 
one perhaps a process rather than an actual seta.) 
Area between maxillipeds and first pair of legs (fig. 15) not protu- 
berant; a sclerotized line between bases of maxillipeds. 
