EEVISION OF L.M.B.C. AMPHIPODA. 421 



Mandibles long ; cutting edge longer than in N. goesii, 

 yellow and strongly refractive. 



Max.^ with outer lobe much longer and broader than 

 inner which has two setce at the tip. 



Max.^ with the inner lobe twice as wide as the outer. 



Mxp. with the base moderate sized, not setose ; the 

 masticatory lobe large and armed with strong triangular 

 tooth-like spines at the tip and nearly half way down the 

 inner side, reaching to the middle of the second joint of 

 the palp ; basal lobe narrow and only half as long as the 

 masticatory ; palp with third joint longer than first or 

 second, last joint of the usual claw form. Eyes very large, 

 oval, dark brown. 



Gn.i Strong, first joint nearly as long as last three ; 

 carp, more than half the length of prop. ; prop, in male 

 tapering to base of dact., armed with five or six short 

 stout spines along the hinder margin ; the female has the 

 margins almost parallel, the postero-distal extremity 

 rounded and provided with three spines placed close 

 together, not setose ; dact. rather short with three spinules 

 close together in the middle of the hind margin. 



Gn.2 Prop, subchelate, rather shorter and nearly as 

 wide as carp. 



Prp. First and second with first joint about the same 

 width as third (merus) which is longer than fourth, and 

 about the same length as fifth ; the last three prp. increase 

 in length successively but slightly ; first joints dilated, 

 hind margins entire ; the third joint in third and fourth 

 prp. is wider and more produced posteriorly than in the 

 fifth ; dact. of moderate size. 



Up. First and second with rami shorter than ped. 

 spinous ; third with inner ramus much shorter than 

 outer, styliform ; in the male the outer is rather shorter 

 than the ped. and furnished at the tip with a tuft of long 



