6i 



U)ut is usually broad and often well marked. The last three 

 segments of the perseon are notably shorter than the rest, and 

 the demiarcation of the side-plates is very faint. In the uropod* 

 the peduncular plate has on its upper half two obliquely trans- 

 verse ridges fringed with spines like those along the margin^ and 

 at the apex of its hinge margin it has two plumose setae- 



The first antennae have the first joint short and wide, the rest 

 narrow, the flagellar joint being about as long as the second and 

 third joints of the peduncle combined, widening a little from its 

 base, then tapering, fringed with about i8 pairs of filaments- 



The epistome is much wider above than below, produced 

 upward to a short median triangular point, its lowfer margin 

 straight, scarcely so wide as the upper lip, which is proximally as 

 well as distally fringed with seta-like spines, those projecting 

 from the distal margin being very closely set; the margin itself 

 is unsymmetrically bilobed- The lobes of the lower lip are also 

 rather strongly fringed on the inner margin. 



The mandibles have the basal part double-ridged and the 

 extremity geniculate. The cutting plate is four-toothed, the 

 secondary plate tridentate, its teeth horny-looking on the left 

 mandible, slighter^ pellucid, and a little setulose on the right. No 

 spine-row was perceptible. The molar is prominent, with oval 

 denticulate crown. 



The first maxillae have the outer plate surmounted by ten, or 

 sometimes by eleven, spines, some of which are denticulate,_none 

 "^-ery powerful- The inner plate is narrow at both ends, anc! has 

 at the apex only two setae, which are rather long, and, as usual, 

 plumose. 



The second mlaxillae have some of the spines on the inner plate 

 plumose, those on the middle plate finely pectinate, about fifteen 

 in number. 



The maxillipeds have the first joint short, the epipod nearly 

 parallel-sided, not reaching the apex of the process of the second 

 joint, though extending considerably beyond the first 

 joint of the palp ; its upper margin slopes inward. The 

 process of the second joint is shaped as comtnonly 

 in the Amphipoda Gamanaridea, and similarly 

 fringed with setae on the inner and animal marjrins, but 

 here it is tied to its fellow, each member of the pair carrying a 

 strong spine-hook for grappling the other. The first joint of the 

 palp is small and rather obscure, the second is very large, widen- 

 ing distally, its distal margin flatly rounded on the inner part and 

 cxternallv forming a little free projection. The third joint is also 

 -rery large, its inner margin almost continuous with that of the 

 preceding joint, feebly convex, fringed vnth short spines, its outer 

 margin strongly convex, fringed with seta-like spines, some of 

 which also stand out from the surface. ^ 



The character of the first gnathopods has been already notic<Kl 

 in remarks on the genus- 



