REPORT ON THE AMPHIPODA. 711 



First Maxillx. — luner plate slender, with one spine-like seta on the apex ; outer 

 plate long, straight, apically bordered with eleven (?) dentate spines, the upper and 

 outer very strongly toothed with few teeth, the lowest on the inner margin having nine 

 to eleven lateral denticles ; a little brush of cilia below the latter ; the palp seemingly 

 one-jointed, rising on the outer margin of the outer plate at a level with the top of the 

 inner plate, and reaching with a smooth pointed apex nearly to the base of the outermost 

 spines of the outer plate. 



Second Maxillse not well observed, both plates probably slender, apically narrowed, 

 the inner rather shorter than the outer. 



Maxillipeds. — The shaft large and strong ; the inner plates narrowing distally, the 

 outer margin rounded at the shoulder, and the apical running obliquely forwards and 

 forming an elongate tooth on the inner side ; two strong acute spines and a cilium are 

 attached to the side of this tooth-hke process ; the outer plates of solid structure, 

 reaching a long way beyond the inner, the inner margin unarmed but for a seta near 

 the middle, the apex almost acute, the apical region, much of the hind margin, and a 

 tract within the front margin covered with short cilia in regular rows ; first joint of 

 the palp small, with some long setae at the inner apex ; second joint shorter than the 

 third, with some setaj on the inner and apical margins ; third joint nearly straight, 

 with setse or spines on both margins, a group of six pairs near the inner apex ; the 

 fourth joint very short, its nail consisting of a small oval spine sheltered by a cap which 

 the tip of the fourth joint forms for it ; were the palp straightened, the third joint would 

 reach beyond the outer plate. 



First Gnathopods. — Side-plates massive, covered with scale-like markings, of nearly 

 oblong shape, with the lower front angle rounded off. First joint not reaching the end of 

 the side-plate, in length about equal to the next four joints, with setae on its rather sinuous 

 front margin ; second joint stout except at the base, as long as the wrist ; third joint 

 very short, with five pairs of setse on the hind margin ; wrist shorter than the hand, but 

 broader, fringed with setae behind, and carrying them at two points in front ; the hand 

 long, widest near the base, then tapering slightly, fringed with setse on the hind margin, 

 groups at three points in front, no palm ; the finger half the length of the hand, the nail 

 curved, the inner margin of the finger peculiar in being set with four distinct spines at 

 intervals. 



Second Gnathopods. — The side-plates gently curved, long and narrow, furry on the 

 middle part of the hinder margin. The first joint not reaching the end of the side-plate, 

 a little dilated in its lower half, length fully equalling the third, fourth, and fifth joints 

 outstretched together ; the second joint longer than the wrist ; the third joint short, l)ut 

 much longer than the third of the first pair, lightly furred on the very convex hind 

 margin ; the wrist a little longer than the hand, and stouter, furred with scales on 

 both margins, and carrying one or two setae on the hind apex ; the hand elongate, widest 



