AMPHIPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 493 
angle quadrate and very slightly produced; third, rounded anteriorly, inferior margin 
slightly convex, posterior more strongly convex, posterior angle quadrate (fig. 20). 
Eyes large, prominent, oval, less darkly pigmented in the larger specimen. Upper 
antennze more than half the length of the body, first segment stout, with sharp tooth 
below and smaller lateral teeth at its extremity ; second as long as the first, but much 
more slender, ending in numerous sharp teeth which are almost as long as the third 
joint ; third joint very short, also ending in sharp teeth; flagellum much longer than 
the peduncle, many-jointed, each second joint produced below and bearing calceoli in 
addition to other setze, proximal joints very short ; accessory flagellum slender. 
Gnathopoda similar to those of H. antarcticus, but with the propod broader; second 
gnathopod slightly larger than the first; first and second pereeopoda very slender, 
longer than the gnathopoda; third, fourth, and fifth pairs increasing in length, the 
fifth being about as long as the perzeon and pleon combined. First uropod with outer 
branch about two-thirds the length of the inner, which is as long as the peduncle ; 
second with outer branch half the length of the inner and as long as the peduncle ; 
third with peduncle short, branches subequal and slender; telson more than twice as 
long as the peduncle of third uropod, very narrow, with two slight lateral ridges on the 
upper surface and a shallow central groove between them; cleft not more than one- 
sixth the length, the two posterior lobes very acute and widely divergent. 
Length of body: up to 835 mm. 
It is only with great reluctance that I establish this new species, but the compres- 
sion of the hinder part of the body and its production into carinal teeth is carried to 
a much greater degree than in any of the species of Husivruws known to me. In all the 
specimens of H. antarcticus only the pleon segments are produced into teeth, with 
occasionally a small tooth on the last segment of the perzeon; and until transitional 
forms are known it will, I think, be safer to rank the present specimens as a separate 
species. There are also some differences in the uropoda, but whether these are merely 
associated with age or not I cannot say. 
The general resemblance to H. antarcticus in the appendages is, however, so great 
that I should not be surprised if it proves ultimately to be a special form of that 
species. Waker has, however, had larger specimens before him which apparently 
showed only the normal amount of carination. 
Genus EKurymera Pfeffer, 1888. 
Eurymera monticulosa Pfetter. 
Eurymera monticulosa Pfeffer, 1888, p. 103, pl. 1. fig. 3. 
3 iy Stebbing, 1906, p. 357. 
os ie Chevreux, 1906p, p. 59, figs. 34-36. 
South Orkneys, Scotia Bay, Station 325; dredge, 4 fathoms, gravel bottom, 
clumps of weed. 3rd December 1903. Temperature 29°:1. One specimen, 
imperfect, 15 mm, 
