PYCNOGONIDA CALM AN. 
61 
Achelia hrucei, sp. n. (Text-fig. 1(3). 
Occurrence .—Station 220, off' Cape Adare, 45-50 fathoms; 4(> $, 16 $ (incl. 
Holotype). 
Description .—The specimens recorded under this name differ from A. communis 
(Bouvier) (of which I have examined four specimens, presented to the British Museum 
by Prof. Bouvier) only in the following characters 
(1) The somites of the trunk are defined dorsally only by more or less indistinct 
grooves on the surface of the integument. Very often the groove between the first 
and second leg-bearing somites, and less often that between the second and third, are 
emphasised by differences of colour, but only in one single specimen do these two lines 
appear to be marked by an actual fold of the integument giving a distinct double 
outline, as in the specimens of A. communis. 
Fig. 16. — Achelia hrucei, sp. n., ovigerous Male. A. Dorsal view of body with chelophores, palps, and 
first and second coxie. B. Lateral view of body with chelophore, palp, and oviger. C. Third 
leg of right side. 
(2) The chelophores fall far short of the middle of the proboscis. In the specimens 
of A. communis that I have examined they reach the middle. 
(3) The antero-lateral tubercles of the cephalon are very slight or altogether absent 
in the female, and much less prominent in the male than they are in A. communis. 
(4) The sette on the legs are less numerous. 
The value of these characters is somewhat discounted by the comments that 
Bouvier makes on the variability of his species, but the constancy of the segmentation 
of the trunk in the large number of specimens that I have examined suggests that this 
character, at all events, is of specific value. 
The specific name is chosen in compliment to Commander Wilfred M. Bruce, 
R.N.R., who, I am informed, gave valuable help in the operations of trawling and 
dredging on board the “ Terra Nova.” 
