Freshwater Amphipod from New Zealand. 425 



following particulars regarding some of the appendages, 

 those appendages which are not mentioned being understood 

 to present no features calling for special mention beyond the 

 description already given. 



Upper lip firm and strong; distal margin regularly 

 rounded and nearly semicircular, covered with a fur of fine 

 setse converging towards the centre. 



First maxilla. Outer lobe strong, with the usual strong 

 denticulate setas at the end ; inner lobe small and very slender, 

 with two long plumose setae at the extremity. On the outer 

 margin of the outer lobe is a slight notch, indicating the 

 position of the rudimentary " palp," but I can find no trace 

 of the palp itself. 



Maxillipedes (fig. 4) fairly large and well developed. The 

 inner lobe is long, reaching as far as the end of the outer 

 lobe ; it is oblong, and the extremity, which is slightly 

 oblique, bears, in addition to some fine setae, three rather 

 blunt teeth, of which the innermost one is the smallest and 

 the outermost one the largest ; the outer lobe has the inner 

 margin nearly straight and fringed with fine setae, the outer 

 margin curved and without set^ except at the extremity; 

 the meros has one or two seta3 at the extremity on each margin ; 

 the carpus is broad, being produced on the inside into a flat 

 expansion densely fringed with fine setae ; propodos much 

 narrower than the carpus, slightly curved, margins parallel, 

 the extremity bearing numerous fine setae ; the dactylos 

 small, partially imbedded in the propodos, the extremity 

 bears several setae, one of which is much longer and stronger 

 than the others. 



First gnathopod (fig 5). The general form will be suffi- 

 ciently understood from the figure and the description already 

 given. The well-marked row of long setae on the carpus is 

 on the outer portion of the posterior margin, which is slightly 

 produced into a flat expansion ; a few sette are irregularly 

 placed on the inner surface of the propodos. 



Becond gnathopod. The difference in the form and size of 

 this appendage in the two sexes is very marked. Fig. 7, 

 which represents the inner side of the appendage in the 

 female, shows that there is a small tuft of two setae present 

 on the inner surface of the carpus in addition to the row of 

 setae on the posterior margin. 



Uropoda (figs. 9, 10, 11). The first and second pairs of 

 uropoda are well developed and present no remarkable 

 features; the third are rudimentary and very minute, the 

 only part that can be easily made out being that shown in 

 fig. 11, which appears to represent the single ramus; it is 



