4. PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
fourth and sixth joints, bearing sensory bristle with broad base and 
provided with numerous filaments. Sixth joint bears distally a long 
dorsal bristle, which is bare or with short hairs distally. End 
joints with five slender bristles and two long stout c- and f-bristles. 
Second antenna (figs. 2b, c): Exopodite: first jomt elongate with 
small medial spine distally; second joint about one-third length of 
first; third joint about twice length of second; distal margins of 
second to eighth joints with medial comb of short spines; basal spines 
not observed. First joint without bristle; bristle of second joint 
about three-fourths length of joint, bearing short marginal spines. 
Bristles on joints three to eight bearing natatory hairs, without 
marginal spines. End joint provided with four stout bristles with 
natatory hairs, and two short slender bristles without hairs. Endop- 
odite 3-jointed; first jot with five short basal bristles and one 
long distal bristle, all bare, except for single spine observed near 
middle of long bristle on some specimens; second joint elongate, with 
two bristles provided with short spines (one specimen had three 
bristles on one appendage only); third joint elongate, arcuate, with 
two short bare annulate bristles and about five serrated ridges near 
tip (appendage which had three bristles on second joint had only one 
short bristle near tip of third joint). 
Mandible (figs. 2d—f): No coxale endite. Basale: ventral margin 
with four short slender bristles with short spines, and two long bristles 
with wreaths of long hairs. Dorsal margin with three bristles, one 
near middle and two at distal corner, middle bristle and one of two at 
distal corner bearing short spines distally. Medial surface with five 
short bristles proximally near ventral corner and one short bristle at 
middle near ventral margin. Exopodite (fig. 2e) almost reaching 
middle of first endopodite joint with two terminal bristles, distal 
about one-half length of proximal bristle, both with short hairs dis- 
tally on some specimens; tip of joint with blunt hirsute process. 
Endopodite: first joint with one bare short bristle and three long 
hirsute ventral bristles distally. Second joint dorsal margin with 
proximal group of two, and distal group of six bare bristles; ventral 
margin with two bare bristles distal to middle, one short annulate 
bristle, and two clawlike bristles subdistally. End joint (fig. 2f) with 
two large subequal claws, one short dorsal claw, and three bare annu- 
late bristles. Medial surfaces of basale and first and second joints of 
endopodite provided with groups of hairs. 
Maxilla (figs. 2g, h): Very small. Exopodite with one proximal 
and two distal bristles; proximal bristle bare, annulate, about one- 
third length of longest distal bristle; longest distal bristle with hairs, 
annulate, longer than combined length of second and third joints of 
endopodite; second distal bristle nonannulate, semitransparent, with 
