258 Transactions.—Zoology. 
Fam. I. Cyclopide. 
Head consolidated with thorax; foot-jaws two pairs, generally small; 
fifth pair of legs rudimentary ; eye single; both of the superior antenne in 
the male furnished with a swollen hinge-joint. 
Genus I. Cyclops, Müller. Fig. D.2 a-l. 
Foot-jaws large and strong, branched; inferior antenne simple; 
external ovaries two. 
1. Cyclops nove-zealandie, nov. sp. 
Female.—Cephalothorax greatly exceeding in length the three following 
segments, produced downwards in front into an obtuse beak. All the body 
segments rounded on their postero-lateral margins; segments of the 
abdomen slightly produced posteriorly above and below, last segment with 
the whole posterior margin finely serrated.. Superior antenne fourteen- 
jointed ; last five articulations long and slender. Each joint furnished with 
one or more setze, which are most abundant on the basal joints ; terminal 
joint with one long and four shorter sete. Inferior antenne four-jointed ; 
first joint bearing at its extremity a long plumose seta, which exceeds the 
rest of the antenna in length; second nearly smooth ; third with the inferior 
margin sinuously curvéd and bearing about eight sete ; last joint terminated 
by seven unequal sete. Mouth organs as in C. quadricornis. Last pair of 
legs two-jointed ; basal joint very short; second sub-triangular in shape 
and bearing three sete, the longest of which is plumose. Caudal lamelle 
about four times as long as broad, with a line of serrations down the outer 
margins. Sete sparingly ciliated near the base, but becoming beautifully 
plumose towards the middle and extremities; inner seta longer than the 
abdomen, about eight times as long as the lamelle ; outer seta about five 
times as long as lamellie ; a short-toothed seta on the outer margin at the 
extremity; two more on the inner margin. Ovaries usually of a slate blue 
eolour, broadly oval, only about half as long as the abdomen, and diverging 
somewhat widely from it. 
Male.—Smaller than the female and more active, similar in shape, but 
readily distinguished by the shape of the superior antenne. These have 
the joints much more crowded together, and very flexible. Antepenultimate 
joint not setiferous; ultimate joint having about eight setæ on one side, the 
last (and longest) being somewhat removed from the smooth extremity. 
These last two joints have an extremely flexible hinge, and ean be bent 
completely back so as to lie against the io joints. Fifth pair of legs 
as in the female. 
AH 
brown oil globos: sometimes so encrusted with Foe and confervoid 
DNE SESS EE Slat ride M LIE 
