102 Transactions.— Zoology. 
Sub-fam. HanPACTINEX. 
Genus Dactylopus, Claus. 
Body elongated, cylindrical. Anterior antenne 5-9-jointed, genieulate 
in the male ; posterior pair with a rather small 2- 3-jointed secondary branch. 
Mandible-palp composed of a basal joint, with two 1-jointed branches. 
Posterior foot-jaws forming a clawed hand. Four anterior pairs of legs 
with both branches 8-jointed ; first pair having the inner branch elongated, 
first joint very long, second and third very short, and ending in two claws, 
outer branch shorter, ending in four claws; fifth pair 2-jointed, foliaceous. 
1. D. tisboides, Claus. (Die frei lebenden Copepoden, p. 127 ; taf. xvi., 
: figs. 24-28. 
Rostrum short and conical. Anterior antenn 8-jointed (9-jointed, 
Brady), tapering from the base in the female, bearing numerous setæ. 
Inner branch of posterior antennæ 3-jointed. Posterior foot-jaw with an 
elongate-oval hand, with a single long seta near the middle of its inner 
margin. Outer margins of both branches of the first pair of feet with 
pectinate setæ ; inner branch with the first joint longer than the whole outer 
branch, bearing a long plumose seta on the inner margin; outer branch 
with the middle joint thrice as long as the first or third, ciliated on both 
margins, and with the cilia of the outer margin usually strong and spinous. 
Next three pairs of feet have the branches nearly equal, bearing long 
plumose sete, and ciliated on the external margins; the second pair in the 
male has the second and third joints coalescent, the outer margin excavated 
above and below the middle, and bearing one large crooked spine and 
several strong short sete, and at the apex two stunted spines, the inner 
margin bears three sete two of them very long and plumose. Fifth foot 
having both joints subequal, broadly ovate, and bearing several rather long 
apical sete. Caudal segments short; inner caudal sete about two-thirds 
as long as body. Length, + of an inch (7; Brady). 
The above description, which is chiefly taken from Brady's Monograph 
(Brit. Cop., vol. ii., p. 106), agrees very closely with the form commones 
here, except in size. 
I have also got a second form, which for convenience may be termed 
var. a, differing in some respects. The anterior antenne have the first four 
joints stout and broad; the foot-jaws with the hand stout, wanting the seta 
on the inner margin, but bearing a short, eurved, plumose spine on the 
wrist; the inner branch of the first pair of feet destitute of the long seta on 
its inner margin; and the fifth pair of feet with the outer joint broad, and 
only bearing five sete. 
Hab. Both forms occur in Dunedin Harbour, the normal type most 
abundantly ; in shore kelp. 
