Amphipoda Ilg peri idea collected by the 'Discovery.' 1 249 



with one or two long seta? ; carpal process half as long as the 

 propodus, seriated on its inner distal margin ; hinder margin 

 ot t lie propodus bearing numerous fine serrations ; curved edge 

 of the dactylus finely serrated. 



Third and fourth legs about equal in length ; merus as 

 long as, but slightly broader than, the carpus, the anterior 

 border slightly produced at its distal end ; propodus a little 

 longer than the carpus, serrated on its hinder margin, 

 which bears numerous small setae ; dactylus slightly curved, 

 about half as long as the propodus. 



Fifth and sixth legs considerably longer than the third and 

 fourth ; basal joint broad and ovate ; merus slightly shorter 

 than the carpus ; propodus very long and linear, as long as 

 the two preceding joints ; the anterior border of the merus, 

 carpus, and propodus bearing numerous small setae ; dac- 

 tylus feebly curved, about £ of the length of the propodus. 



Seventh leg (PI. V. fig. 5) : basal joint almost as long and 

 quite as broad as those of the preceding limbs ; the anterior 

 border with four strong setae ; remaining joints remarkably 

 reduced in size, forming an almost inconspicuous appendage; 

 the entire limb reaching to about ^ of the length of the fifth 

 and sixth legs. 



Pleon equal in length to, but slightly deeper than, the 

 pereion ; pleopods with the peduncles a little shorter than the 

 rami. 



The urus : second and third ural segments free, not 

 coalesced ; hinder corners of the last ural segment slightly 

 produced backwards. 



First pair of uropoda: peduncles about equal in length to 

 the rami ; both rami with serrated margins. 



Second pair of uropoda not reaching to the apex of the 

 third pair ; peduncles considerably shorter than the rami ; 

 outer ramus slightly shorter and narrower than the inner ; 

 both rami with serrated margins. 



Third pair of uropoda : peduncles longer than the rami; 

 both rami with fine serrations on the inner and outer margins. 



Telson (PI. V. fig. 6) semicircular, about £ as long as the 

 peduncles of the last uropods. 



Length, excluding antennae, 8 mm. 



Vibilia serrata may be easily recognized by the serrations 

 on the epimeral plates and by the curious structure of the 

 seventh leg, which is quite unlike that found in any other 

 species of this genus, with the exception of V. hodgsoni, which 

 will be described later. 



The large size of the eyes is a distinguishing feature, 

 although it is possible that this may be a sexual character, as 



