yp era a 
G. M. Txomson.—On the New Zealand Copepoda. 105 
Hab. Taken abundantly with the dredge in Dunedin Harbour. 
This species was originally described by Dr. Claus from the Mediter- 
ranean (Messina); the specific name refers to the scissor-like appearance of 
the caudal forks and sete. The European specimens appear to be smaller 
than ours, being only 0:8 mm. (j& of an inch) in length, but in other 
respects are very similar. 
Genus Harpacticus, Milne- Edwards. 
* Body elongated, or broad and depressed. Head united with the first 
thoracic segment; first and second abdominal rings coalescent in the 
female. Anterior antennz 8- or 9-jointed ; fifth and sixth joints swollen in 
the male. Mandible-palp 2-branched, large. Posterior foot-jaws strongly 
developed. First pair of feet with outer branch 3-jointed, first and second 
joints elongated, third rudimentary; inner branch 2-jointed, terminal joint 
very short. Three following pairs of feet with both branches 8-jointed ; 
in the male, the inner branch of the second pair modified by having the 2nd 
joint produced into one or more spines, while in the third foot the outer 
branch is converted into a stout clasping organ, which is bent across the 
inner branch, and has its last joint armed with several strong spines. 
Ovisac single. 
1. Harpacticus chelifer, Müller. Pl. VI., figs. 12-16. 
rpacticus bairdii, mihi, Trans. N.Z. Inst., vol. xi., p. 259.) 
In the description already given of this species I have made one or two 
errors, which in the absence of a clear description of H. chelifer, led me to 
consider my specimens to belong to a new species. The anterior antenne 
are 9- (not 10-jointed), and the relative length of the joints (in the female) 
is as follows :— 
1, 9 B, 4, b, 6, Ts 8, 9, 
iL 18. 2 E 8. : A 5 
In the male, the anterior antennæ are hinged between the fourth and 
fifth joints, the fifth and sixth being swollen and corrugated. The hand of 
the posterior foot-jaw is subtriangular, and externally very convex, its inner 
margin being somewhat abruptly angled, strongly excavate and furnished 
with numerous spines ; its apex bears one (or two) falciform claws. 
The first pair of feet have the inner branch 2- (not 9-) jointed, and ter- 
minating in two claws. The second foot in the male has the median joint 
of its inner branch externally produced into a long spine, which greatly 
exceeds in size the small third joint. The outer branch of the third foot 
in the male is furnished with three strong spines at its apex, and is bent 
across the inner branch. In the fifth foot of the male, the basal joint is 
obsolete. 
This species is common in the European seas, and is by far the most 
abundant of our littoral Copepods. 
