“TERRA NOVA” EXPEDITION. 
24 
{^\\ 5V]. cLi^ <U-\ S 
Colossendeis robusta, Hoek. 
C. robusta, Hoek, 1881, p. 66, PI. ix, figs. 4 and 5 ; Mobius, 1902, p. 190, PI. xxix, figs. 1-5 ; 
Bouvier, 1913, p. 54, text-figs. 8-11. 
Occurrence .—Station 294, Ross Sea, 158 fathoms; 1 $, 1 immature. 
Measurements, in mm. — “ Terra Nova.” “Challenger.” 
Stn. 294. 
Hole 
type. 
8 
? 
Length of proboscis 
. 
17-5 
15 
0 
Greatest diameter of 
proboscis . 
4-4 
4 
0 
Length of trunk 
. 
17-0 
14 
75 
Width between secom 
1 and third lateral 
processes 3 ’ 3 6 
2 
9 
Width across second 
lateral processes 
11-2 
9 
2 
Length of abdomen 
o 
. 
4 • G4 
4 
0 
Third right leg 
Coxae 
11-25 
9. 
25 
Femur 
. 
31-75 
2G- 
0 
First tibia . 
29 • 0 
24- 
5 
Second tibia 
31-75 
27- 
75 
Tarsus 
12-0 
40- 
7 5 
Propodus . 
10-0 
8- 
0 
Claw. 
7 • 3 
4- 
0 
Remarks .—Of the two 
specimens referred 
to this species, the 
one i 
s a male 
and the other an immature 
specimen in which 
the genital opening 
3 are 
not yet 
patent. The former differs 
from the holotype 
m having (1) the second coxae of all 
the legs a little more expanded distally and with more prominent dorsal tubercles, 
and (2) the claw much more than half the length of the propodus. In both of these 
characters our specimen agrees better with Bouvier’s figures and description than 
with the holotype. On the other hand, the outline of the proboscis agrees very 
well with that of the holotype (not very accurately represented by Iloek’s figure) and 
differs from Bouvier’s figures in that the proximal dilatation is well beyond the 
middle of the length. The femur is exactly equal to the second tibia instead of 
being slightly shorter (holotype) or longer (Bouvier). It is to be noted that the 
measurements given by Bouvier as those of the holotype are taken from Hoek’s figure, 
which, however, is enlarged two diameters; those given above are taken from the 
specimen itself. 
A conspicuous, or at any rate very tangible, and perhaps important difference 
from the holotype consists in the presence of minute scattered spines on the proboscis 
(where they are set, not very regularly, in longitudinal rows) and on the dorsal surface 
of the legs ; the surface of the body is smooth. 
The immature specimen has the proboscis relatively more slender than in the 
adult. 
