152 
MR. I. C. THOMPSON ON THE COPEPODA OF 
Delay alia robusta, Brady Sf Robertson. 
Diosaccus tenuicornis, Claus. 
One specimen only found at Orotava, Teneriffie. 
Laophonte curticaudata, BoecTc. ' 
L. SERRATA, ClaUS. 
Dactyloptts tisboides, Claus. 
Thalestris Mysis, Claus. 
T. rueocincta, Norman. 
Westwoodia nobilis, Baird. 
Harpacticus chelieer, Muller. 
PORCELLIDIUM VIRIDE, Philippi. 
Idya eurcata, Baird. 
Machairoptjs, n. gen. 
Head longitudinally rounded, terminating in long thin bifid 
rostrum. Anterior antennas 12-jointed, about two thirds the 
length of cephalothorax ; sparingly setiferous. Posterior an- 
tennae long ; the outer branch 3-jointed, the inner 2-jointed. 
Mandibles have very fine claw-like teeth ; the palpi is two- 
branched, with long fine hairs. 
Maxillae have four strong serrated curved spines and numerous 
setae. Posterior foot-jaw 2-jointed, having long sword-like spines 
with enlarged bases. Anterior foot-jaw small. Abdomen 2- 
jointed. 
Machairoptjs sanctje-crttcis, n. sp. (PI. XII. figs. 1-5.) 
Length inch. Pounded head (fig. 1) of a deep pink colour. 
Anterior antennae (tig. 2) 12-jointed. Posterior antennae (fig. 3) 
has long whip-like setae, extending to the length of the anterior 
antennae. Swimming-feet (fig. 4) have three joints to outer 
branch, and two joints to inner. Terminal spine narrow and 
finely serrated. Basal joints of swimming-feet have long spine 
on inner margin. Fifth feet (fig. 5) have one joint terminated by 
a long, stout, curved spine, with a small one at each side. First 
joint of abdomen is small, the second long, and wide in the 
middle. Caudal segments are about four times as long as broad, 
and are terminated by short non-plumose setse. 
All found generally 
/^distributed, but none 
plentiful. 
