AMPHIPODA FROM BAY OF BISCAY. 207 



ten serrations posteriorly. 5th joint half as long again as the 4th ; 

 6th much longer than the 5th ; finger not quite one-third the length 

 of the 6th. The spines on the 4th joint are the longest, those of 

 the 6th the shortest and most numerous ; the apical filaments of all 

 the spines are very long, but do not reach the remarkable length of 

 those of the 3rd peraeopod. 



Peracopod 5, as Chevreux describes it ; 2nd joint longer than broad, 

 six setiform and six short spines anteriorly, thirteen serrations pos- 

 teriorly. The setae as in Peraeopod 4. 



Plcopods. The rami in all three pleopods are about twice as long as 

 the peduncles ; inner ramus with seventeen joints, outer ramus with 

 eighteen ; five cleft spines on the inner ramus, Tlie coupling-spines 

 are set in a little hollow with two long ciliated hairs ; apices recurved ; 

 the upper spine has two large recurved teeth on one side, five small 

 ones on the other ; lower spine with three large and six small. 



Uropod 1. Peduncle considerably longer than the outer ramus ; it 

 carries a row of seven long spines on the inner margin, six on the outer 

 margin, the distal portion of which is produced in a long curved pro- 

 cess reaching more than half-way down over the outer ramus. Outer 

 ramus with three short spines on the margin, one large strong spine 

 and two small inset at the apex. The inner rami are both broken but 

 are evidently longer and broader than the outer. Uropod 2, outer 

 ramus twice as long as the peduncle, inner ramus nearly four times as 

 long. The peduncle carries two long stout spines at the outer angle. 

 Outer ramus narrow, outer margin with three long sensory spines, 

 inner margin with ten or eleven short stout simple spines ; one broad 

 stout spine and two small ones at the apex. Inner ramus broad and 

 laminar ; apex acutely produced : inner margin edged with a thick row 

 of about thirty short stout simple spines ; outer margin with sixteen 

 long sensory spines inset at regular intervals. Uropod 3, badly 

 mutilated in both specimens. Inner ramus two and a-half times 

 longer than the peduncle ; it appears to have small spines on the outer 

 margin, and plumose setae proximally on the inner margin ; both rami 

 broad and laminar. 



Telson. In the Hu:deij specimens the cleft is longer than Chevreux 

 figures it. A pair of long ciliated hairs are inset on either side of the 

 cleft near the margin, and several small flat spines are scattered over 

 the surface proximally ; the apices each with a setule in the fork. 



Distribution. Taken by the Frincesse Alice, 10 July, 1901,33°59' 30" N. ; 

 8° 12' 45 " W. ; trawl ; 851 metres ; 2 females, 7 mm. long. Chevreux (16). 



Taken by the Huxley, 25 August, 1906 ; 48° 7' N. ; 8° 13' W. ; Agassiz 

 trawl ; 240 fathoms ; bottom deposit, fine sand. 



