TEREESTRIAL ISOPODA OF NEW ZEALAND. Ill 



The left mandible has the outer cutting-edge of four teeth much as in the right, but the 

 accessory appendage is much stouter, thick and dark brown similar to the outer cutting- 

 edge ; it ends in several stout teeth, of which tlie outer one is the longest and strongest, 

 and is followed by two short double teeth ; the membranous lobe and the molar tubercle 

 are similar to those of the right mandible. 



The loiccr lip consists of two broad lobes somewhat widely separated, with the ex- 

 tremities broadly rounded and thickly covered with short setae, most of which are 

 directed inwards. 



Thejirst maxillcB are practically the same in form as tliose of Ligia oceanica, the outer 

 lobe being stout, longer than the inner, and provided at its extremity with about eight 

 strongly-curved setae, those to the outer side being the longest and stoutest. The inner 

 lobe is more delicate, apparently membranous ; its extremity appears concave on its inner 

 side, and it bears the three characteristic plumed setae, the distal one being very short 

 and the proximal one the longest. 



The second maxillcs are stoutly formed, oblong in shape, about two and a half times as 

 long as broad, the extremity irregularly rounded, its inner half and the distal portion of 

 the inner margin fringed with sette ; there is also an oblique row of setae on the surface 

 of the maxilla near the end ; the outer margin bears fine setae towards the base, the more 

 distal portion being apparently free. I can find no trace of the two plumose setae which 

 are found in Ligia oceanica towards the end of the inner margin, and the division into 

 two lobes, which is partially indicated in Ligia oceanica and other species, is not recogniz- 

 able at all in the present species. 



The maxiUipedes also show rather more coalescence of the different parts than those 

 of Ligia oceanica ; the first joint {coxa) is short and very broad, and the exopodite arising 

 from it is short, subtriangular, rounded at the end, and its free margins fringed wdth 

 setae ; its articulation with the bases is oblique, extending further distally on the anterior 

 (upper) surface than on the posterior, the extremity of the coxa being strongly convex 

 on the anterior surface but straight on the posterior ; the next joint [hasos) is nearly 

 oblong, fully two-thirds as broad as long, its outer margin slightly convex and bearing a 

 fringe of fine setae ; the inner margin is straight, and is bent inwards (i. e. upicavds, in 

 the usual position of the mouth-parts) to form a piece at right angles to the outer surface 

 of the maxillipedes ; this is thickly covered m ith short tine setae, and narrows distally 

 where it extends on to the masticatory lobe, which is formed ])y a prolongation of the 

 inner part of the basos ; the masticatory lobe is truncate distally, and bears there two 

 stout teeth and many finer setae. The terminal portion of the eudopodite ('' palp 'j 

 shows indications of being formed of five segments, of which only the first and last are 

 completely separated from the others, the second, third, and fourth being coalesced into 

 a flat plate w ith the lines of sutvire visible towards the inner side only ; on the outer side 

 the extremity of each joint is marked by one or two stout sette, the rounded inner 

 margins of the last ibur segments are thickly covered with short setae. Fig. mxp* shows 

 the maxillipede from its anterior aspect, i. e. that next to the second maxilla, and from 

 this point of view the conuectioji of the masticatory lobe with the basos can be clearly 

 made out ; w hen seen from the posterior (fig. uoxp.) the junction of the basos with the 



