AMPHirODA FROM BAY OF BISCAY. 205 



three times as long as the 1st, apex truncate with four or five long 

 spines inset, and al)out ten or eleven stiff setae set in pairs along the 

 \ipper part of the inner margin ; spines and setae very finely serrate. 



Maxilla 2. Inner plate broader than the outer ; the arrangement of 

 the setae as in aS'. impyracea. 



Maxillipcds (figs. 4 and 5). Inner plate reaching to the distal end of 

 the 1st joint of the palp ; upper margin truncate, furnished with four 

 stout feathered spines, two curious bent spines directed inwards, and 

 one feathered seta. The larger of these spines (fig. 4) is situated 

 midway on the margin, the smaller one at the inner angle. Just 

 below the smaller spine, the outer surface of the plate is deeply 

 hollowed, and on the lower edge of this little hollow or groove stands a 

 strong coupling spine (fig. 5). The upper half of the inner margin 

 carries five long stout spines, set one behind the other, feathered on 

 both sides for half their length like the spines on the upper margin. 

 Outer plates reaching almost to the distal end of the 2nd joint of 

 the palp, with a row of twenty-one strong fiat spines, extending along 

 the inner margin to the outer side of the rounded apex. These 

 spines, downturned and apically dentate, increase gradually in length 

 to the eighteenth, the remaining and outermost three are setiform. On 

 the outer surface five or six pairs of setae are inset submarginally, 

 and nearly the whole of the surface is covered with a furry armature 

 of microscopic spinules. The 2nd joint of the pedi) is expanded on 

 the inner side and fringed with long setae, with the fur-like spinose 

 armature distally. The 3rd joint is much expanded on both sides, 

 the finger thus appearing to be set in the middle of the distal margin ; 

 the whole joint is fringed with long setae, and carries a graduated 

 row of cleft-tipped spines on the distal outer angle. The nail is 

 more than lialf the length of the finger, with one setule above and 

 two below. 



Gnathopod 1 (PI. Ill, figs. G and 7), 2nd joint long, lightly curved, 

 carrying six to eight extremely long and delicate plumose setae 

 posteriorly. These setae are sparsely plumose, the feathering being 

 very long and fine ; similar setae are found on the basal joints of 

 Gnathopod 2, and peraeopods 1 and 2. The 3rd joint has one of these 

 setae at the distal angle. 5th joint with the anterior margin fully 

 twice as long as the anterior margin of the 6th ; posteriorly it is a 

 little expanded, covered with the fur-like spinose armature, and 

 furnished with several densely crowded rows of spines on the margin ; 

 one row directed forward of small coarsely dentate spines, one row 

 of small spines, another row of medium-sized, and a row of long 

 clefc-tipped ones similar to the one figured (fig. 6). There a})pears to 



