102 Transactions. — Zoology. 



Sub-faro. Harpactine^e. 

 Genus Dactylopus, Clans. 



Body elongated, cylindrical. Anterior antenna? 5-9-jointed, geniculate 

 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 3-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 lebonden Copepoden, p. 127; taf. xvi., 



figs. 24-28. 



Eostrum short and conical. Anterior antennae 8-jointed (9-jointed, 

 Brady), tapering from the base in the female, bearing numerous setae. 

 Inner branch of posterior antennas 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 setae ; 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 seta?, 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 setae, and at the apex two stunted spines, the inner 

 margin bears three setaa two of them very long and plumose. Fifth foot 

 having both joints subequal, broadly ovate, and bearing several rather long 

 apical seta?. Caudal segments short ; inner caudal setae about two-thirds 

 as long as body. Length, -^ of an inch (Jg- 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 antennae 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, curved, 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 seta?. 



Hab. Both forms occur in Dunedin Harbour, the normal type most 

 abundantly ; in shore kelp. 



