200 EEV. T. E. K. STEBBING ON NEW EXOTIC AMPHIPODA 



The lobe within the first joint of the palp is large, rounded, thin. The second joint of 

 the palp is far the longest ; this on two margins and the straight third joint on one 

 carrying numerous long, fine bristles, not or, if at all, but feebly ciliated. 



Right mandible similar to the left, but with the inner plate not divided into teeth, 

 but laminar, running out into a fine point, and having an oblique microscopically 

 denticulate edge. 



Lower lip with main lobes broad, squared ; mandibular springs presenting only a 

 little free lobe ; inner lobes stout. 



First maxillae: palp with second joint broadening distally, the end obliquely rounded, 

 set with five short spine-teeth, bristles on the distal and inner margin ; eleven more or 

 less serrate spines in a double row on the distal edge of the outer plate, the innermost 

 being straight, the rest curved ; a single bristle at the apex of the inner plate. 



Second maxillse: outer plate much broader than the inner, both fringed distally with 

 rather long, slightly plumose, bristles, which run a little way down the outer margin 

 of the outer, and the inner margin of the inner plate. 



Maxillipeds : inner plates narrow, reaching beyond the first joint of the palp, having 

 on the distal end and part of inner margin straight plumose bristles ; the armature of 

 the outer plate consists of two or three small bristles, six teeth having each the shape 

 of a hand looking-glass, succeeded by two spine-like teeth, and three long, slightly 

 plumose, bristles. The long second joint of the palp does not project beyond the outer 

 plate ; the short third joint is dilated distally ; the fourth joint ends in an almost linear 

 nail, it has one or two short bristles on the inner curve. 



First gnathopods : side-plates very shallow ; first joint long, a little widened distally, 

 numerous long bristles issuing from various parts of margins and surface ; fourth joint 

 not much shorter than the first, with numerous, long, some partially serrate, bristles on 

 edges and inner surface ; a row of short, distally biserrate bristles near the junction 

 with the hand ; hand much shorter than fourth joint, a very long oval ; many long 

 bristles as on the preceding joint ; finger slender, shorter than the hand, three or four 

 short close-lying bristles along the inner margin, and two or three at the place of 

 insertion of the nail. 



Second gnathopods : side-plates oblong, rounded behind, with long bristles, plumose 

 throughout, on the serrate lower margin ; leg similar to that of the first gnathopod, but 

 first and fourth joints longer, fourth and fifth thinner, sixth shorter. The fifth joint, 

 or hand, is covered on the inner surface with successive rows of short, biserrate bristles. 

 The long irregularly oval branchia has on both surfaces a row of subsidiary sacks over- 

 lapping one another for nearly the whole length of the main sack. The narrow 

 marsupial lamella is entirely unfringed. 



First perseopods : side-plate, first and second joints, branchia, and marsupial lamella 

 very similar to those of the second gnathopods ; third joint elongate, longer than fourth 

 and fifth combined, parallel-sided, with long bristles on the hinder, and some short ones 



