16 
“TERRA NOVA” EXPEDITION. 
1 ^ 15 . 7 . 5 . 4.7 
Remarks .— The only specimens of this species remaining in the “Challenger” 
collection are five from Station 313 (East coast of Patagonia). The largest of these, 
a male, is that of which measurements are given by Hoek and supplemented above, 
and it may be selected as the holotype. 
The spe< bmen obtained by the “Terra Nova” is in close agreement with the 
holotype, and, like it, differs from specimens of C. frigid a not only in the greater 
relative length of the claws, but also in the form of the proboscis, the distal part 
of which is nearly cylindrical, with hardly a trace of a sub-terminal constriction. 
It is to be noted, however, that the specimens accompanying the holotype in the 
“ Challenger ” collection are by no means exactly like it or like one another. The 
three smallest specimens (regarded by Hoek as immature, but having distinct genital 
openings) have the proboscis, at most, only a little longer than the trunk and distinctly 
contracted beyond the proximal dilatation. One specimen, in which the proboscis is 
only equal in length to the trunk, and the legs distinctly shorter and stouter than in 
any of the others, is further remarkable in having the tarsus actually shorter than the 
propodus. Another specimen has the seventh palpal segment 110 longer than wide. 
These differences, if the specimens are correctly referred to a single species, imply 
a range of variability that must throw doubt on the validity of other closely-related 
species in the genus. 
It is much to be regretted that the specimen from Kerguelen, referred by Hoek 
to this species, is no longer in the “ Challenger ” collection. 
Colossendeis riu/osa, Hodgson. 
C. rugosci, Hodgson, 1907, p. 64, PI. ix, fig. 4, PL x, fig. 7. 
Occurrence. — Station 294, Ross Sea, 158 fathoms ; 1 £. 
Measurements , in mm .— 
“ Discovery 
“ Terra Novas’ 
Holotype. 
8 
s 
Length of pro!>oscis 
21*0 
13-25 
Greatest diameter of proboscis 
3 • 1 
2-0 
Length of trunk 
9 • 8 
8 • 5 
Width between first and second lateral 
processes 2'25 
1-6 
Width across second lateral processes 
6 • 5 
5'6 
Length of abdomen 
2 • 3 
1-52 
Third right leg— 
O 0 
Coxrn .... 
5 • 5 
5 • 5 
Femur .... 
26 * 0 
23-6 
First tibia .... 
22-0 
19-0 
Second tibia 
21-0 
18-0 
Tarsus .... 
12-0 
7-76 
Propodus .... 
8-5 
6-5 
Claw ..... 
6-0 
5'5 
