1112 THE VOYAGE OF H.M.S. CHALLENGER. 



First Perteopods. — Side-plates rather smaller than the preceding pair. First joint 

 reaching much below the side-plates, with a few small spines on the almost straight 

 front margin, and at the apes of the hinder ; the second joint short ; the third longer 

 than the fourth, not quite so long as the fifth, with two spinules and two groups of spines 

 on the convex front margin, and two groups of spines on the straight hind margin ; the 

 fourth joint with three groups on the hind margin, the apical containing many spines ; 

 the fifth joint with spines at five points of the hind margin, and at the apex and a 

 point near the middle of the convex front margin ; the finger curved, half the length 

 of the fifth joint, with a long dorsal feathered cilium near the base, a smaller ciUum at 

 the base of the nail, and on the inner margin, at a little distance from the nail, a spine 

 with a flexible tip directed towards the nad. 



Second Perseopods like the first, but rather shorter, the difference being chiefly in the 

 length of the first joint ; there is an additional spinule on the front margin of the fourth 

 joint. 



Length. — After the fourth segment of the perseon the specimen was defective ; the 

 existing portion, from the rostrum to the end of the fourth segment, measured one-fifth 

 of an inch. 



Locality. — Station 170a, north of the Kermadec Islands, July 14, 1874; lat. 

 29° 45' S. ; long. 178° 11' W. ; depth, 630 fathoms; bottom, volcanic mud; bottom 

 temperature, 39° - 5. A fragment only. 



Remark. — The specific name refers to the place of capture. 



Family Podoceridse, Leach, 1814. 



In 1814 Leach instituted the Podoceridse as the fourth family of the Gammerides, 

 assigning to it the genera, Corophrium, Podocerus, Jassa. In 1870 Boeck made the 

 Amphithoinae the twentieth [numbered as XIX] subfamily, and the Podocerinse the 

 twenty-first [numbered as XX] subfamily of the Ganimaridse ; in 1872 to 1876, he made 

 these two respectively the first and second subfamilies of the Podoceridse, a family which 

 he defines as follows : — 



" Mandibles strong, apically much dentate ; the secondary plate also dentate ; the 

 molar tubercle prominent ; the spines of the spine-row numerous, often strong, serrate on 

 the convex margin ; the palp elongate, three-jointed, often very strong. 



" Lower Lip with the inner plate large. 



" First Maxillw with the inner plate little. 



" Second Maxillse with broad plates. 



" Maxillipeds having the outer plates armed on the inner margin with strong teeth ; 

 the fourth joint of the palp not unguiform, but apically armed with two curved spines. 



