REPORT ON THE AMPHIPODA. 749 



flagellum of fifteen joints, of which the first is the longest, all united rather shorter than 

 the peduncle. 



Upper Lip. — The distal end unsymmetrically bilobed, the edges not furred. 



Mandibles having an appearance as if the front part were folded or a little inflated so 

 that the spine-row while projecting from an inner edge nevertheless rests against the inner 

 unbulged surface. The cutting edge of the left mandible (represented on the right of the 

 Plate) has a broad sinuous edge cut into about eighteen denticles ; the secondary plate 

 has a broad edge cut into about a dozen denticles ; on the right hand mandible the cutting 

 edge appears to have only seven or eight denticles, but some of these, especially two at 

 the centre, considerably larger than those on the opposite mandible ; there appears to 

 Ije a very thin broad-edged secondary plate, with the edge finely dentate, wearing a 

 striated appearance ; the spine-row of ten or eleven spines ; molar tubercle and palp 

 absent. 



First Maxillee. — Inner plate with an almost acute apex and a single subapical seta ; 

 the outer plate short, carrying six spines on the truncated distal margin, the inner one 

 much shorter than the rest, smooth, the next two long, finely denticulate, the fourth long, 

 smooth, the fifth very slender, the sixth more slender than the fifth ; the inner margin 

 almost straight, conspicuously ciliated or edged with spinules ; the first joint of the palp 

 as broad as long, the second not twice the length of the first, with two or three spine- 

 teeth on the apex, a subapical seta, and five small spines along the serrate inner 

 margin. 



Second Maxilla not well made out in the specimen figured. A second specimen 

 shows them to be short, the outer plate bending over the very short inner one ; the inner 

 plate has four setae spaced upon its margin, one of them being on the rounded apex ; the 

 inner plate has four setge on its somewhat truncate apex and one on the outer margin, 

 this margin being convex, much longer than the smooth inner margin. 



Maxillipeds. — The inner plates minute, elliptic, with two apical setae, reaching a very 

 little way along the inner margin of the broad second joint, which carries no plate, but 

 appears to be part of the elongate palp, having two apical spines on the outer side, and 

 half a dozen spines or setae on or near its inner margin ; the first joint of the palp rather 

 longer than broad, equal in length to the third, longer than the second, all three carrying 

 a few spines on the inner margin, the third having a long spine on the inner apex, three 

 long ones near the outer apex, and the distal part strongly ciliated ; the finger broad at 

 the base, tapering, with the inner margin carrying some ten spine-like cilia, the remaining 

 half narrow, part of it fringed with short cilia, the inner margin being double for a short 

 distance ; there are two cilia near the tip. 



First Gnathopods. — Side-plates very small, completely covered by the following pair ; 

 there are one or two setules on the front margin ; the lower margin not projecting on 

 either side of the first joint. The first joint entirely clear of the side-plate, equalling 



