REPORT ON THE AMPHIPODA. 1191 



but in this species not stout on either ; the spine-row consists on the left mandible of 

 three, on the right of two, short, moderately broad spines tapering distally and much 

 denticulated; the molar tubercle moderately prominent, with a very small laminar 

 process on the edge; the first joint of the palp a little longer than broad, widening 

 distally ; the second joint wider than the first at the base and widening distally, about 

 twice as long as broad, with about eighteen feathered spines on the surface near the 

 front margin ; the third joint wider and a little longer than the first, but narrower than 

 the second, not twice as long as broad, with about sixteen long feathered or pectinate 

 spines round the distal margin, a row of four on the surface below the apex near the 

 outer margin, and another row of two or three below these. 



Lower Lip. — The principal lobes distally rounded, scarcely broader than the distal 

 part of the inner lobes ; the mandibular processes produced to a narrow but not acute 

 point, with the inner margins tending to concave, the outer a little convex. 



First Maxillse. — The inner plate if rightly observed is small, with a small seta or 

 two at the apex ; the outer plate not elongate, narrowing from the middle to the 

 truncate distal margin, which carries nine spines, some with one lateral denticle, some 

 with two, none, I think, with more ; the first joint of the palp very short, the second 

 reaching beyond the outer plate, narrower at the two ends than in the middle, the distal 

 margin dentate, carrying four spine-teeth with little denticles on the middle of their outer 

 edge ; there are five slender spines close to the upper part of the inner margin, two 

 submarginal to the apical border. 



Second Maxillse. — The inner plate a little shorter and a good deal narrower than the 

 outer, the inner margin smooth tUl near the apex, then serrate and furnished with plumose 

 setae ; the apex narrow, fringed with spines, some of which also are arranged alongside 

 of the setse ; the broader apex of the outer plate in like manner carrying numerous long 

 spines, crow T ded on the inner part, spaced on the outer slope. 



Maxillipeds rather short. The inner plates narrow, reaching beyond the first joint of 

 the palp, the inner distal angle occupied by feathered setae, with a bent spine-tooth just 

 below the apex, the distal margin a little sinuous, with three (or two) spine-teeth and 

 several slender feathered spines ; the outer plates reaching beyond the middle of the 

 second joint of the palp, with twelve spine-teeth along the inner margin, a thirteenth on 

 the distal margin, followed by three setiform spines; the first joint of the palp very 

 short, with some spines on the inner apex ; the second joint about twice as long as the 

 first, with the slender spines on the inner margin not very numerous ; the third joint 

 as long as the first, widening distally, with long feathered spines about the distal half ; 

 the finger not as long as the third joint, unless the pectinate ungual spine be included : 

 this spine is attended by others inserted near it on the inner apical margin of the finger, 

 one of the three spines being similar to the nad, and nearly as long. 



First Gnathopods. — Side-plates wider below than above, the front margin nearly 



