894 THE VOYAGE OF H.M.S. CHALLENGEE. 



71° 22' E.; depth, 150 fathoms; bottom, coarse gravel; bottom temperature, 35°'2. 

 One specimen. 



Station 149h, off Cumberland Bay, Kerguelen, January 29, 1874; depth, 127 

 fathoms ; bottom, volcanic mud. One specimen. Dredged. 



Remark. — The specific name refers to the ocean in which the specimens were found, 

 and has, it must be allowed, no special appropriateness. 



Iphimedia pidchridentata, Stebbing (PI. LXXIL). 



1883. Iphimedia pidchridentnta, Stebbing, Ann. and Mag. Nat. Hist., ser. 5, vol. xi. p. 206. 



The Rostrum long, somewhat curved and depressed, rather broad near the base, acute 

 at the apex ; the lateral margins of the head produced below and at the centre into two 

 sharp processes, that in the middle curving a little downwards, the lower curving rather 

 upwards ; perseon broad across the back, rounded, pleon much more compressed ; all the 

 segments of the peracon and the first three of the pleon have the postero-lateral angles 

 sharply produced, in the sixth and seventh segments of the peraeon the processes being 

 very long and downward curving, in the second and third of the pleon slightly upturned ; 

 the sixth and seventh segments of the peraeon have also two, the first and second of 

 the pleon three, the third of the pleon two, large backward-directed processes on either 

 side of the dorsal line, in the peraeon-segments the upjter pair larger than the lower, 

 both with the upper margin convex ; in the first two pleon-segments the upper margin 

 of the upper and the lower of the lowest pair are convex, in the third segment the 

 lower margins of both pairs ; the first four segments of the pleon are dorsally carinate, 

 the carina being produced backwards in a large tooth or process, on the top of which in 

 the second and third sep-ments there is a small denticle, while in the fourth segment the 

 process is slightly tip-tilted ; the sixth segment is acutely angled beyond the base of the 

 telson; there is a marked transverse dorsal depression on the seventh segment of the peraeon 

 and on the fourth of the pleon, the intervening segments having slighter depressions. 



The Eyes are round, rather prominent, situated close to the margin of the head below 

 the rostrum. 



Upper Antenna?. — The first joint has a tooth near the base, and three large but 

 unequal distal teeth ; the second joint is as long as the first, having on one side a small 

 distal tooth, on the other a very long one which outreaches the third joint ; the flagellum 

 is missing, but there is present what appears to be a rudimentary one-jointed secondary 

 flagellum. 



Loiver Antenna). — The first three joints very short, the first particularly small but 

 produced into a long tooth, the second forming three large pointed processes of differing 

 widths, the widest apparently being the gland-cone, the third joint shorter than the 

 second, with an irregular distal margin carrying a small tooth on one side and a more 



