“TERRA NOVA'’ EXPEDITION. 
36 
parts, the fingers of the chelae being much shorter than in that species, the femur 
equal to the first tibia and longer than the second, the second segment of the palp 
relatively a little longer, and the last two segments of equal length. In Ch. villosum 
also the proboscis is not contracted at the base. 
Nymphon biart iculatum (Hodgson) ? 
Chsetonymphon biart iculatum, Hodgson, 1907, -p. 28, PI. iv, fig. 2, PI. x, fig. 12. 
Occurrence. — Station 314, McMurdo Sound, 222-241 fathoms; I 
Remarks. —The single specimen agrees in many characters with the holotype of 
Hod gson’s species, but differs in the more compact body, the shorter and stouter legs 
clothed with shorter setas, the much less elevated ocular tubercle, and in a number of 
other minor points. It is quite possible that it may represent a distinct species, but 
as it is solitary and far from perfect, no good purpose would be served by a more 
detailed but necessarily incomplete description. 
Nymphon mendosum (H odgson). 
(Jhsetonymplion mendosum, Hodgson, 1907, p. 30, PI. iv, fig. 3, PI. x, fig. 13. 
Occurrence. —Station 220, off Cape Adare, 45—50 fathoms ; 3 specimens. Station 
314, McMurdo Sound, 222-241 fathoms; 11 specimens. Station 318, McMurdo Sound, 
130 metres; 1 specimen. Station 321, McMurdo Sound, 169 fathoms; 3 specimens. 
Station 338, Entrance to McMurdo Sound, 207 fathoms ; 3 specimens. Station 340, 
off Granite Harbour, 160 fathoms; 13 specimens. Station 355, McMurdo Sound, 300 
fathoms; 1 specimen. Station 356, off Granite Harbour, 50 fathoms; 7 specimens. 
Remarks. —The form of the chelre in this and some allied species appears to afford 
diagnostic characters to which sufficient attention has not yet been drawn. In N. 
mendosum the immovable finger lies nearly at right angles to the palm, the setose 
cushion on its lower edge occupies more than half its length, the movable finger extends 
beyond it for a considerable distance, and the teeth of both fingers are widely spaced. 
In the closely allied A. hi art iculatum the immovable finger forms a very oblique angle 
with the palm, the setose pad extends for less than half its length, the overlap of the 
movable finger is less extensive, and the teeth are more closely set. X. villosum , again, 
is in most of these characters intermediate between the two. 
A t/mphon australe , Hodgson.* 
N. australe, Hodgson, 1902, p. 257, PI. xl. 
Clisetonymplion altioculatum, Mobius, 1902, p. 181, PL xxvi, figs. 1—6. 
Chsstonymphon australe, Hodgson, 1907, p. 32, PI. x, fig. 14. 
Ch. australe var. austrinorum, Hodgson, t.c. p. 35, PL iv, fig. 4, Pl. x, fig. 15. 
Nymphon stylojps, Bouvier, 1911, p. 1137 ; id ., 1913, p. 73, text-figs. 25-31. 
* The assumption that Hodgson’s name has priority over that given by Mobius in the same year 
depends on the fact that the records of this Museum show the distribution of the “ Southern Cross ” 
Report to have been begun on 31st May, 1902, while Mobius’ Report on the “ Valdivia ” Pycnogonida 
was not received by our Library until 30th December, 1902. 
