Amphipoda and Isopoda 213 



First maxillai (Plate IV., Fig. 7) with the inner plate much shorter 

 than the outer, and armed at its apex with two plumose setae, the outer 

 of which is remarkably stout and very densely hirsute ; outer plate 

 armed at the apex with eleven strong spines, seven of which are longer 

 and stouter than the rest, and bear numerous small spinules, the remain- 

 ing four expanding somewhat towards the tip, which bears few rather 

 coarse teeth ; palp, two-jointed, extending slightly beyond the apex of 

 the outer plate, the second joint expanding somewhat towards the 

 extremity, which is armed with eight short, stout, distinctly articulated 

 spines, in addition to a small tooth at the inner distal corner, its inner 

 margin, at some distance from the apex, bearing two slender teeth. 



Second maxillce (Plate IV., Fig. 8) with both plates rather broad, 

 the inner rather shorter than the outer, their apices armed with a row 

 of strong plumose setae and numerous fine hairs. 



Maxillipedes (Plate IV., Fig. 9) with the inner lobe very well 

 developed, quadrangular in shape, its inner margin armed with six long 

 setae, a single small spine and a few short setae present on its inner 

 corner ; outer lobe large and expanded, reaching to the distal end of 

 the second joint of the palp, its inner border finely crenulated through- 

 out ; palp well developed and rather stout, four-jointed, with numerous 

 setae on its inner edge. 



First gnathopods (Plate IV., Fig. 10) moderately robust and distinctly 

 subchelate ; basal joint about as long as the remainder of the limb, and 

 armed with numerous setae on its anterior border ; carpus longer than 

 the propodus, and somewhat expanded, armed with numerous long 

 setae on its inner edge ; propodus quadrangular in shape, narrowing 

 very slightly towards the nail, the palmar edge slightly and finely 

 serrated and bearing two long prominent spines on the corner, as well 

 as a few long setae ; nail longer than the palmar edge, with a small 

 secondary spine on its inner margin. 



Second gnathopods (Plate IV., Fig. 11) longer than the first, very 

 slender ; carpus longer than the propodus ; the latter, with the nail, 

 forms a minute chelate extremity to the limb ; both propodus and 

 carpus with the usual fringe of fine hairs on both margins, and numerous 



