MARINE COPEPODA OF NEW ZEALAND. 45 



foot-jaw and fifth pair of feet. The manus of the second pair of foot-jaws (PL IX. 

 fig. 29) is ovate, elongated, the anterior margin fringed with a continuous series of 

 short seta? ; terminal unguis long and slender. Feet of the fifth pair (PI. XII. fig. 14) 

 stout, simple, with truncate apex, which bears three short, stoat, and very blunt spines, 

 the outermost of which is attached at a little distance from the apex : the inner 

 margin bears beyond the middle a single seta ; the outer margin has also a single seta 

 much nearer the base, and is slightly pubescent between that point and the apex. 

 The shell is extremely hard and thick, and closely beset with small circular puncta. 

 Colour dark brown. Length "85 millim. 



Hab. Taken in the surface-net, Port Chalmers and Otago. 



Subfamily Idyin^. 



Genus Idta Philippi. 



1. Idya furcata (Baird). 



Tisbe furcata Claus, Lilljeborg. 

 Canthocamptus furcatus Baird . 

 Idya furcata Boeck, Brady, Thomson. 



On algae in Lyttelton Harbour. " Common in shore-kelp and rock-pools near 

 Dunedin ; also on kelp in Paterson's Inlet " (Thomson). 



Genus Scutellidium Claus. 



1. Scutellidium plumosum, sp. nov. (Plate XII. figs. 16-21, 23-25. ) 



In general form and appearance indistinguishable from the British S. tishoides. 

 The setose investiture of the first foot (fig. 20) is, however, more dense, and the 

 spinous armature of the last joint of the outer branch of the swimming-feet (fig. 21) 

 is also different, there being on the outer margin towards the apex two plumose 

 lancet-shaped spines with intermediate small hairs, while in S. tishoides (fig. 22) there 

 are three stout, non-plumose, dagger-shaped spines with no intermediate hairs. Fifth 

 foot in the female (fig. 25) elongated, slender, subcrescentic, pointed at the extremity, 

 with setose margins, but not pubescent on the surface ; in the male (fig. 23) small, 

 subquadrate, with obliquely truncated apex, which bears three long and several 

 shorter setae. The antennules in the male are geniculated (fig. 16) : from the second 

 joint springs a small Particulate peduncle, which bears three stout sensory filaments, 

 and to the antepenultimate joint is attached a much longer and stouter sense-oigan. 

 Length -88 millim. 



Hab. This species occurred sparingly in surface gatherings from Otago and Port 

 Chalmers, and in gatherings from seaweeds in Akaroa and Lyttelton Harbours. 



