ISOPODA FROM NEW 2EALAND. 423 



extremity bears about eight or nine strongly curved teeth o£ (he usual 

 character and there are a few fine setse on the distal portion o£ «he inner 

 }nargin ; the inner lobe bears at the end the usual three plumos>e setse of 

 unequal length, the most distal one being the smallest, a few minute setae are 

 found near its base at the apex of the lobe. 



The second maxilla (fig. 16) has a few long slender setse at the base of the 

 inner margin ; the apex is indistinctly divided into the usual two lobes, the 

 outer one being much the smaller, the whole of the inner lobe is thickly 

 covered with rather stout short curved setse ; more delicate setse are present 

 on the outer lobe and on the distal part of the outer margin of the naxilla. 



The maxillipeds (fig. 18) are of the usual form ; the epipod is about half as 

 long as the broadly expanded second joint, it is rounded at the extremit}'-, 

 which bears a few very delicate setse, and it is slightly narrower near the 

 base where both margins are fringed with fine setse ; the broadly expanded 

 second joint is about twice as long as broad, the very convex outer margin 

 is regularly fringed in its distal half by long delicate setse, and the whole of 

 the inner margin is fringed with slightly stouter setse. The palp portion is 

 formed of a single piece with setse of different kinds arranged so as to indicate 

 faintly the separate joints which it represents ; at the apex of the masti- 

 catory appendix or inner lobe is a small conical portion bearing three or four 

 circlets of minute setse. 



The legs are slightly longer and more slender than those of N. Jielmsii and 

 of the same general character, they do not increase in length posteriorly, 

 and I have not observed any secondary sexual characters in connection with 

 them. Plate 37. fig. 19 represents a leg of the first pair ; the setse on the 

 merus and carpus are more numerous than those in the corresponding 

 positions in iV. Jielmsii, and on the inner margin of the propod are three 

 fairly stout setse placed at regular intervals along its length ; the propod is 

 slender, narrowing considerably towards the extremity, and on its lateral 

 surface about the middle there is a small area thickly covered with short 

 minute setse ; this patch of setse, however, does not appear to be present in 

 the other legs. 



In the pleopoda I have not made out the first pair in the female, they are 

 probably small as in species of Haplophthalmus ; the second pair has the form 

 represented in fig. 20, having the inner branch long, narrow, tapering to the 

 end, which is marked with fine transverse lines which appear to be formed 

 of minute transverse rows of setse. I had originally described this as the 

 pleopod of a male specimen ; it corresponds, however, to the second pleopoda 

 of the females of some species of TricJwniscus and allied genera. I have 

 only a small number of specimens of this species and have not found a 

 male among them. The third (fig. 21), fourth, and fifth pleopoda have the 

 same general character as in N. Jielmsii. 



