982 THE VOYAGE OF H.M.S. CHALLENGER. 



high up on the inner margin of the second, the third with some twelve or thirteen similar 

 spines or setse on the margin and apex. 



Lower Lip. — The lobes capable of wide dehiscence, ciliated on the narrow top and 

 the inner margin ; the mandibular processes short and divergent, The figure l.i. A was 

 drawn from the Heard Island specimen, and seems to show the extreme dehiscence of 

 which the lobes are capable, causing the generally very divergent mandibular processes 

 to assume a position parallel to one another. For what is probably the more normal 

 position and appearance the figure of the lower lip of Liljeborgia haswelli may be 

 consulted. On the inner margin near the apex there seems to be in both species a small 

 spine among the cilia. 



First Maxillse. — Inner plate small, almost oblong, with a plumose seta at the apex 

 and a shorter one below it ; the outer plate with ten spines of various lengths, two short, 

 with only a single lateral tooth apiece, several long and slender and much denticulate, 

 the strong outermost spine with a little denticle on each side ; the second joint of the 

 palp reaching far beyond the outer plate, carrying five or six spine-teeth on the apical 

 margin, and several spines on the inner margin and near the apex, besides two on the 

 outer margin. 



Second Maxillss. — The inner plate short and broad, shorter and much broader than 

 the outer, with plumose spines round the apical and a little way down the inner margin, 

 the latter having some strong cilia below ; the inner plate has several spines on the apex, 

 and two or more small ones on the outer margin. 



Maxillipeds. — The inner plates narrow, not reaching much beyond the base of the 

 first joint of the palp, with two long spines on the inner margin, three spine-teeth and 

 four slender spines on the apical margin ; the outer plates narrow, reaching a little beyond 

 the first joint of the palp, fringed on the inner side with ten or eleven spine-teeth, the 

 two longest completely occupying the apex ; there are besides some submarginal slender 

 spines on the outer surface ; the first joint of the palp is short, with two spines on the 

 outer margin near the rounded apex, the second joint is very long, widening distally, 

 fringed with spines on the inner margin and outer apex ; the third joint is also long, yet 

 shorter than the second, like that having many spines ; the finger is long and broad, 

 shorter than the third joint, the nail minute, the inner margin not much curved, 

 pectinate, the dorsal cilium small, near the base. 



First Gnathopods. — The side-plates narrow at the base, very broad below, the front 

 margin running oblicmely forward to the lateral lobes of the head, bending abruptly 

 downwards, and forming a small tooth before bending round to join the long lower margin ; 

 the hind margin nearly straight, forming a small tooth at its juncture with the lower 

 margin. The first joint of the limb reaching much below the side-plate, slightly longer 

 than the hand, and much narrower, r with short spines standing out from the front margin, 

 and many long setse on the hind margin ; the second joint short ; the third not much 



