6i 



►but is usually broad aiul often well marked- The last three 

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

 the demarcation of the side-plates is very faint. In the uropods 

 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 setse- 



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 comljined, widening a little from its 

 base, then tapering, fringed with about i8 ])airs of filaments- 



The epistome is mucli wider above than below, produced 

 upward to a short median triangular point, its lower 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 A-ery 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 maxillcE; have the outer plate surmounted by ten, or 

 sometimes bv eleven, spines, some of which a'^e denticulate, none 

 very powerful- The inner plate is narrow at both ends, and has 

 at the apex only two set?e. which arc rather long, and, as usual 

 plumose. 



The second m;axillje 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 

 join , though extending considerably \ond the first 

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

 procf^'^s of the second joint is shaped as commonly 

 in the Amphipoda Gamanaridea, and similarly 

 frinr d with setffi on the inner and a^^iV i marfvins. but 

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

 exter-^-i1v forming a little free projection. The third joint is also 

 very large, its inner margin almost continuous with that of the 

 preceding joint, feeblv convex, fringed with short spines, its outer 

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

 whicli also stand out from the surface. ^ 



The character of the first gnathopods has been already noticed 

 in remarks on the genus- 



