G. M. Thomson. — On the New Zealand Copepoda. 93 



Akt. IV. — On the New Zealand Copepoda. By Geo. M. Thomson, F.L.S. 

 (Read before the Otago Institute, 9th Stay, 1882.) 

 Plates V. to XI. 

 In the N.Z. Inst. Trans., Vol. XL, pp. 258-259, I described two species of 

 Entomostraca belonging to the Order Copepoda — viz., Cyclops novm-zea- 

 landice and Arpacticus bairdii. I had numerous other forms in my collec- 

 tion at the time, but, from want of text-books on this little-known order, 

 was unable with any certainty to work them out. This difficulty having 

 been in great measure overcome, I am now enabled to contribute 

 a little information to our knowledge of this interesting group of 

 animals. 



The forms described in this paper have been obtained from only a few 

 situations, the marine species being either from rock-pools or shore-kelp 

 along the coast, or taken by the dredge in Otago Harbour at a maximum 

 depth of 6 fathoms. Small as the number of species already identified is, 

 they show a remarkable approximation to European forms. As the litera- 

 ture of the subject is not readily accessible to members of the N.Z. Institute, 

 I make no apology for introducing generic characters. The classification 

 followed is that adopted by Brady in his beautiful " Monograph of the 

 British Copepoda," recently issued by the Ray Society. 



Of the 8 families represented in the British fauna, I have only met with 

 representatives from 4 — namely, Calanidae, Cyclopidae, Harpacticidae and 

 Artotrogidas. 



(Note. — Four species of Copepoda were obtained by Dana near New Zealand, and are 

 described in the " Crustacea of the U.S. Exploring Expedition (1855) ;" they are Pontella 

 valida, Pontellina simplex, Sapphirina gemma and Miracia gracilis). 



Fam. CALANIDJE. 

 Sub-fain. Calanin^e, Dana. 

 Eye single, composed of several lenses ; thorax and abdomen long and 

 slender ; rostrum (if present) . slender, and usually fuscate ; anterior an- 

 tennas 24-2 5 -jointed. 



Genus Boeckia,* gen. nov. 

 Body elongated, compressed ; head not distinct from thorax. Abdomen 

 consisting of five segments in the male, and of three in the female. Bight 

 anterior antennae of the male geniculated. Posterior antennae two-branched, 

 the secondary branch having four small intercalated median joints. Man- 

 dibles large, with a sharply toothed cutting portion, and a broad palp ; the 

 latter bears two branches, one four- and the other three- (or two-) jointed. 

 Maxillae furnished with numerous strong marginal plumose setae. Anterior 



* In honour of Axel Boeck, author of several works on Copepoda. 



