EEPORT ON THE AMPHIPODA, 725 



trace of a secondary plate on the right mandible, nor any trace of an articular condyle 

 on either. 



Lower Lip, seemingly very short, not strongly ciliated, but with a strong tuft of 

 cilia at the apex of the forward lobes ; the mandibular processes unusually broad. 



First Maxillw. — Inner plate short, irregularly oval, with five plumose setse of no 

 great length on the apical border ; outer plate oblong, of no great length, the apical 

 border almost straight, with eight (or ? nine) slender, slightly curved spines, no one of 

 which seems to have more than two lateral denticles, the denticles being minute ; the 

 long second joint of the palp over-arching the outer plate, with six spine-teeth on the 

 apical margin, the outermost one or two being considerably the longest ; there are 

 besides one or two spiny cilia on the inner side. 



Second Maxilla} short and rather broad, the inner plate with curved spines and 

 plumose setse, about a dozen in all, passing from the apex half-way down the inner 

 margin ; the outer plate but little overtopping the inner, its inner margin straight, its 

 apical margin carrying a dozen spines of various sizes, curved at the tips. 



Maxillipeds. — The broad prismatic inner plates not reaching quite so far as the apex 

 of the first joint of the palp ; the plumose setse beginning high up on the inner margin ; 

 the apical mai'gin most advanced centrally, carrying five not closely-set spine-teeth on the 

 inner slope and some elongate slender spines on the outer, also one or two spine-teeth 

 just below the apex on the inner margin ; outer plates extending beyond the second joint 

 of the palp, inner margin almost unarmed, but apically produced into a long acute process, 

 at the base of which on the outer side is a small cilium, followed some way further down 

 the outer margin by a single long, feathered spine ; within the inner margin are some small 

 spines, not visible in the figure because they are on the outer surface ; the second joint 

 of the palp not longer than the first, the third not longer than the fourth ; the first, 

 second, and third with seta3 only on the apices, the fourth with a distinct nail. 



First Gnathopods. — Side-plates short and broad, much rounded in front, not 

 reaching to cover the base of the lower antennse. First joint of the limb projecting 

 much beyond the side-plate, broad, widening below, the front margin straight, the 

 hinder convex, with long, distally plumose setse on both margins ; the second joint 

 broader than the third, and as long or longer, with pectinate spines at the apex ; the third 

 with no free front margin, distally acute, hind margin bent, the lower part bordered with 

 pectinate spines ; the wrist not as long as the hand, becoming very broad distally, 

 where it has pectinate spines before and behind ; the hand broad, with front margin 

 convex, longer than the straight hind margin, some pectinate spines on both, and a few 

 short ones on the inner surface ; the palm rather deeply concave, defined by a large and 

 a small spine and some cilia at the projecting end of the hind margin ; the finger not 

 massive, long enough to reach the end of the palm ; some cilia near the origin of the 

 nail on the inner margin, the dorsal cilium small, placed near the hinge. 



