MAEINE COPEPODA OF NEW ZEALAND. 49 



long and slender (fig. 24). Antennules very short, fourteen-jointed (?) (fig. 23), the 

 basal joints very indistinctly marked ; comparative lengths of the joints as in the 



following formula: }. ' j? " ?/ \ ' f/ « • 7 • 8 • 9 • 10 • n • 12 • 13 • u First se „ ment of thp 

 3 5 2± 2% 2k 2± 4 5 4 6 4 5 5 5 ■ -r" 81 segment ot tne 



abdomen much longer than the following segments, inclusive of the furca (fig. 26). 

 The mouth-organs and swimming-feet present no distinctive characters. Length 

 I'l millim. 



Sab. Akaroa Harbour, 6 fathoms. 



Genus Caligcjs. 



1. Caligus longicaudatus, sp. nov. (Plate XII. fig. 26.) 



A single specimen of a Caligus, which seems distinct from any described species, 

 occurred in a surface-net gathering from Port Chalmers. The much elongated 

 abdomen, the abruptly angular carapace, together with the slenderness and length of 

 the last pair of feet, are the chief distinctive characters. Length 5 millim. 



EXPLANATION OF THE PLATES. 



PLATE IX. 



Par acalanus parvus, p. 32. 

 Fig. 1. Antennule of male, X 140. 

 Fig. 2. Foot of fifth pair of male, X 210. 



Clausocalanus furcatus, p. 32. 

 Fig. 3. Female, seen from right side, X 84. 

 Fig. 4. Fifth pair of feet of female, X 250. 

 Fig. 5. Antennule of male, X 84. 

 Fig. 6. Fifth pair of feet of male, X 210. 

 Fig. 7. Abdomen and foot of fifth pair, d , seen laterally, x 165. 



Acartia ensifera, p. 33. 

 Fig. 8. Female, seen from above, X 84. 

 Fig. 9. Abdomen of female, seen from right side, X 110. 

 Fig. 10. Fifth pair of feet of female, X 210. 

 Fig. 11. Terminal spine of one of the swimming-feet, x 210. 

 Fig. 12. Right antennule of male, X 140. 

 Fig. 13. Left antennule of male, X 140. 

 Fig. 14. Abdomen of male, X 110. 

 Fig. 15. Fifth pair of feet of male, X 250. 



i2 



