REPORT ON THE AMPIIIPODA. 921 



distally divided into two long teeth, curved towards each other, a denticle projecting 

 from the side of the inner and longer of the two ; spine-row of about eight denticulate 

 spines ; molar tubercle close to the spine-row, with the denticles of the crown rather 

 elongate ; a small process between the molar tubercle and the palp ; the palp is set over 

 or a little in advance of the molar tubercle, the first joint short, the second with the 

 outer rim slightly concave, having some spines along the surface towards the inner 

 margin, the third joint a little shorter than the second, widening distally, the outer 

 margin very convex, with a spine about a third of the way up it and another on the 

 adjoining surface, also with a row of five long spines on the outer surface near the base, 

 none on the inner margin, but some sixteen of various sizes on the broad, truncate, 

 slightly oblique, distal margin. 



Lower Lip. — Principal lobes rather deep and thick, little dehiscent, w T ell cdiated on 

 the inner maroiu. 



First Maxittm. — Inner plate rather large, with some sixteen plumose setae along 

 the inner and apical margins, that adjoining the actual apex being the longest and 

 thickest ; outer plate with eleven spines on the truncate distal margin, the denticulation 

 of the spines being confined to the distal part of their inner margin and there having a 

 prominent convex outline ; the first joint of the palp longer than broad, with one or two 

 spinules on the outer margin, the second joint wide, with one or two spinules on the 

 convex outer margin, and eight or nine spine-teeth on the truncate distal margin, 

 accompanied by several setae or slender spines inserted on the surface below the 

 spine-teeth. 



Second MaxiUse. — The plates elongate, inner a little shorter than the outer, about 

 ecpial to it in breadth, with a long row of plumose setae on the surface, beginning low 

 down on the inner margin, and spines passing round the apical and a little way down the 

 inner margin ; the outer plate with a similar arrangement of longer spines, also some 

 short ones at the apical part of the outer margin, and two or three spinules near the 

 base of it. 



Mdxittipeds narrow. Inner plates long, reaching to the distal end of the first joint 

 of the palp, with several plumose setae on the inner margin, three spine-teeth and some 

 curved spines on the truncate distal margin ; the outer plates not reaching to the 

 distal end of the second joint of the palp, with fourteen or fifteen spine-teeth on the 

 slightly concave inner margin, six curved setae passing round the apical margin and 

 distal part of the outer margin ; there is a row of spines on the outer surface near 

 the inner margin ; first joint of the palp as long as the third ; the second longer, 

 bordered with not very numerous spines ; the third with its distal margin as usual set 

 round with spines, produced on the outer side over the base of the finger ; the finger 

 small, with a spine-like nail, near to which are three or four cilia ; the dorsal cilium 

 near the base very small. The figure of these maxillipeds shows the inner plates 



(ZOOL. CHALL. EXP. — PAET LXVII. 1887.) XxX 116 



