92 TEANSACTIONS 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 jointed, the outer branches three 

 jointed. The second, third and fourth pairs have both 

 branches three jointed. The fifth feet are two jointed in 

 the female, and three jointed in the male. 



Herdmania stijlifera, n. sp. (PL XXVIII, figs. 1 — 12.) 

 Length 0.60 mm. Body ovate, rounded anteriorly with 

 a small rounded rostrum. Anterior antenna3 of female 

 (fig. 2) nine jointed, the first joint being 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 setiie which thickly 

 clothe the antennoe are plumose. The first joint of the 

 male antennie (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 sw^elling, 

 the apical joints being narrow and curved. Posterior 

 antennae (fig. 4) two branched, the inner branch composed 

 of two joints ; the outer branch is considerably shorter and 

 composed of four joints, the basal joint of which is about 

 equal to that of the inner branch, the three terminal 

 secfments being very short. Mandibles (fig. 5) have four 

 sharp teeth, and a two branched palp with numerous 

 short setae. 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) is four jointed and is 

 covered with spines and setae. 



Diligent search of the only two specimens found and 



