104 BRITISH COPEPODA. 
third, and fourth pairs are 3-jointed and bordered 
with chitinous plates, their marginal spines extremely 
stout, and in length much exceeding the width of the 
limb; the last joint has at the apex two long and 
much more slender spines. Basal joint of the fifth pair 
produced into a large quadrangular mternal segment, 
which has four apical spines and a few small cila 
(fig. 18); second joint smaller, subovate, its external 
margin divided into five sete. 
Several examples of this very distinct species were 
noticed in a gathering from between tide-marks at 
Lake Lothing, Suffolk, where the water of Oulton 
Broad finds its way to the sea. Though the gather- 
ing was made amongst the fronds of Muci the water 
would no doubt be brackish. JI have more recently 
found a few examples at Seaton Sluice, in the brackish 
pools which have been spoken of in connection with 
Nannopus palustris and other species. 
Sub-family 7. Warpacticina, Boeck (in part). 
Body cylindrical, or, less commonly, broad and de- 
pressed. First pair of antennz 5—9-jointed ; secondary 
branch of second pair 2- or 3-jointed. Mandible- 
palp 2-branched, usually largely developed. First 
foot-jaw triangular, not chelate; with several digi- 
tate marginal processes, second foot-jaw forming a 
strong clawed hand; outer branch of the first pair 
of feet always,. inner branch usually, clawed and 
