REPORT ON THE A.UPIIIPODA. 1009 



strongly feathered on the concave margin ; the last joint has a pair rather stronger and 

 shorter than those on the other joints, besides several slighter appendages. 



Loiver Antenna 1 . — The first two joints very short, the gland-cone not prominent ; the 

 third joint as long as the two preceding united, or a little longer, with several slender 

 spines at the lower apex ; the fourth joint as long as the second of the upper antennae, 

 curved at the base, bordered with spines below ; the fifth joint as long as the fourth, 

 simdarly fringed with spines, feathered on the concave margin, and attaining their 

 greatest length at the apex of the joint ; the flagellum of six joints is shorter than the 

 peduncle, and rather shorter than the flagellum of the upper antennae ; the apical spines 

 of the last two joints are stouter than the others, but feathered in the same manner. 



Mandibles scarcely differing from those of Photis macrocarpus, except that the third 

 joint of the palp is very little widened distally, and has not so many spines on the 

 apical margin. 



Loiver Lip as in Photis macrocarpus. 



First Maxilla?. — Inner plate small, oval ; outer plate broad, the broad distal margin 

 carrying ten spines, with but few lateral denticles, three of them having a single denticle 

 on the outer convex side, two having two denticles on the inner concave side ; the five 

 spine-teeth on the distal margin of the palp's second joint much resemble those in the 

 other species, the outermost rather narrow, the innermost very narrow, the three between 

 broad, furcate, with the outer edge dentate. 



Second Maxilla? bke those in Photis macrocarpus, but without the flattened distal 

 edge of the inner plate. 



Maxillipeds similar to those of the species just mentioned ; the distal margin of the 

 inner plates slopes a little inwards, and has the spine-teeth regular in shape, the slender 

 spines fewer in number ; the outer plates have five spine-teeth on the inner margin and 

 four on the inward-sloping distal margin ; the third joint of the palp is longer than the 

 first. 



First Gnathopods. — Side-plates rather deep, not expanded below. The first joint 

 with some long setae at various points of the convex hind margin, and others on the 

 surface projecting on the front margin ; the second joint short, with a large group of long, 

 more or less feathered, setae near the hinder apex ; the third joint very little longer than 

 the second, with numerous long spines crossing the inner surface a little above the apex ; 

 the wrist broad, in length nearly equal to the hand, with a group of spines on the front 

 apex, many more or less pectinate on the hind margin, and groups near it on the inner 

 surface ; the hand is oval, broad at the base, narrowing towards the hinge of the finger, 

 the front margin smooth, but with two large groups of spines on the inner surface near it 

 and an apical group, the hind margin occupied chiefly by the finely pectinate palm, which 

 is bordered by various spines singly and in groups ; there are at intervals two or three 

 strong palmar spines, and on both surfaces there are spines remote from the margin ; the 



