186 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
appendages, the apical one three jointed. First pair of 
foot jaws (fig. 7) four jointed, the second foot jaw is not yet 
determined. The first pair of swimming feet (fig. 8) has its 
inner branches two joimted, the outer branches three 
jointed. The second, third and fourth pairs have both 
branches three jomted. The fifth feet are two jointed in 
the female, and three jointed in the male. 
Herdmamea stylifera,n.sp. (Pl. XXVIII, figs. 1—12.) 
Length 0.60 mm. Body ovate, rounded anteriorly with 
a small rounded rostrum. Anterior antennee of female 
(fig. 2) nine jointed, the first joint beimg the largest and 
produced into a beaky spine at the apex of the inner side. 
The second and third joints are about equal in length, 
and both rather smaller than the first. The fourth joint 
is about one quarter the length of the third; the fifth is 
about as long as the sixth and seventh together. The 
eighth is long and narrow, and the ninth is a very small 
apical prominence. Some of the sete which thickly 
clothe the antennz are plumose. The first joint of the 
male antenne (fig. 3) is about the same length as that of 
the female its beaky spine being recurved downwards, the 
fourth and following joints forming a vesiculiform swelling, 
the apical joints being narrow and curved. Posterior 
antennee (fig. 4) two branched, the inner branch composed 
of two joints; the outer branch is considerably shorter and 
composed of four joints, the basal jomt of which is about 
equal to that of the imner branch, the three terminal 
seoments being very short. Mandibles (fig. 5) have four 
sharp teeth, and a two branched palp with numerous 
short sete. Maxilla (fig. 6) has a large lobe and four 
branches, the apical of which is composed of three very 
small joints. First foot jaw (fig. 7) 1s four jointed and is 
covered with spines and sete. 
Diligent search of the only two specimens found and 
