JREPORT ON THE AMPH1PODA. 1099 



Maxittipeds. — The inner plates widening distally, not reaching quite to the apex 

 of the palp's first joint, with setae and spine-teeth as in Gammaropsis exsertip>es, but the 

 spine-teeth broader at the base; the outer plates not nearly reaching the end of the second 

 joint of the palp, with seven spine-teeth on the serrate inner margin, and five or six long 

 curved spines round the serrate apical margin, the two lowest almost setiform ; the first 

 joint of the palp short, the second long, with many sjfines along the inner margin, and 

 a group above the middle, and another at the apex, of the outer margin ; the third joint 

 as long as the first, expanding a little distally, set round the apex, the distal half of the 

 inner margin, and on the surface with many spines ; the finger very short, with a strong 

 spine projecting from its apex, the spine longer than the body of the finger, the inner 

 margin of which carries four slighter spines near the large one. 



First Gnathopods. — Side-plates not produced at the lower corner, neither reaching 

 nor directed towards the basal joints of the lower antennas. The first joint reaching 

 considerably beyond the side -plate, narrow at the point of attachment but presently 

 widening, with setse on the upper part of the convex hind margin, and groups of slender 

 spines below, channelled in front and having the front margins a little concave ; the second 

 joint with a group of spines near the hinder apex ; the third joint with several groups of 

 spines along the hind margin and round the apex ; the lower margin concave, forming an 

 acute front apex ; the wrist not quite so long as the first joint, subequal in length to the 

 hand, and almost as broad, the front margin having two groups of spines, the surface 

 several broad rows of them, the hind margin numerous groups, some of the spines being 

 strongly pectinate ; the hand longer than broad, broadest at the beginning of the slightly 

 obbque and convex pectinate palm, both margins having numerous rows of spines on the 

 adjacent surface ; smaller groups occupy the centre of the surface, and the palm margin 

 has scattered spines as well as groups. The finger fits the palm, reaching as far as the point 

 where a palmar spine is inserted, not on the margin, but the surface ; its inner margin 

 is divided into small decurrent teeth, and there are some setules near the base of the nail. 



Second Gnathopods. — Side-plates a little broader and deeper than the preceding 

 pair, with small setules round the convex lower margin. Marsupial plates short, 

 surrounded with long setse. The first joint reaching much beyond the side-plate, the 

 front channelled, concave, carrying spinules at intervals, the hind margin convex, 

 fringed with groups of long spines or setse ; the second and third joints as in the first 

 gnathopods, but with fewer spines on the hind margin of the third joint ; the wrist 

 much shorter than the hand, distally cup-like, with spines at the apex in front, and along 

 the lower margin on the inner surface, and in six or seven groups along the serrate hind 

 margin ; the hand not twice as long as broad, with seven or eight groups of spines along 

 or near the convex front margin on the inner surface, nine large groups along the serrate 

 hind margin, which is not produced into a tooth at the commencement of the obbque 

 palm, which forms an angle with it, and is for a short space concave, then convex, 



