6 G. STEWARDSON BRADY. 
dorsal margin boldly and evenly rounded, ventral evenly convex but not so 
fully arched as the dorsal margin. Seen from above (fig. 3) the outline is ovate, 
searcely twice as long as broad, widest in the middle, rounded off in front, strongly 
mucronate behind. The ventral border of the rostrum is produced into a thin lamina 
which is partly overlaid by long closely-set hairs, and the posterior border of the 
subrostral sinus is similarly fringed (fig. 4). Shell-surface closely and very finely 
punctated throughout, smooth, except on the ventral aspect, where it bears numerous 
seattered hairs. Just behind the rostral sinus there isa small patch of eleven or twelve 
subparallel strize, and a short series of stiff hairs just within the ventral margin: a 
large black eye-spot just within the dorsal border at its anterior third. 
The shell of the male (fig. 1) is larger and more elongated than that of the female, 
nearly twice as long as broad, with a less pronounced rostral sinus and a much narrower 
and more produced posterior extremity, the eye-spot small and situated near the 
centre. 
Length of the male, 2°3 mm. ; of the female, 1*7 mm. 
The setee of the terminal fascicle of the antennule in the female are very short-— 
not more than half the leneth of the limb; the second (or third ?) seta of the antennee 
is spinulose (fig. 8) in the female, the remaining sete are simply ringed : the secondary 
branch of the antenna (fig. 6) is of the usual form, but has an indistinctly jomted 
appearance at the apex. Principal tooth of the second maxilla (female) (fig. 9) sharp 
and broadly triangular ; ungues of the caudal lamina (fig. 10) rather strongly pectinate 
in the female—but only faintly ciliated in the male. The eyes of the male (fig. 5) are 
pyriform, and deeply pigmented, the frontal tentacle rigid, dilated, and slightly pig- 
mented at the base. Secondary branch of the antenna of the male large and strongly 
prehensile (fig. 7), the last joint bulbously dilated at the apex, basal joint bearing a 
strongly uncinate process. P. antarctica was found rather sparingly in four of the 
gatherings taken at “ No. 4 hole” in a depth of five fathoms. 
The shell was in all cases of a thin, membranaceous character, but I suspect that 
this may have arisen from the solvent action of the formalin preservative on the 
mineral matter. 
POD OGOPIA: 
XESTOLEBERIS RENIFORMIS. 
(Plate I., figs. 4, 5.) 
Shell of the male seen from the side (fig. 4) subreniform, much narrower in front 
than behind, greatest height situated behind the middle and equal to half the length ; 
anterior extremity well rounded, narrow, posterior much wider, not very fully rounded, 
dorsal margin forming a continuous arch, highest behind the middle, sloping very 
oradually backwards and with a rather steep curve towards the front, ventral margin 
rather deeply sinuated in the middle. Seen from above, the outline is broadly ovate 
