36 "TERRA NOVA" EXPEDITION. 



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. 



Nymplwn hiarticulatum (Hodgson) ? 

 GhsetonymjpJion hiarticulatum, Hodgson, 1907, p. 28, PL iv, fig. 2, PI. x, fig. 12. 

 Occurrence.— ^teition 314, McMurdo Sound, 222-241 fathoms ; 1 ?. 

 Remarks. — The single specimen agrees in many characters with the holotype of 

 Hodgson's species, but differs in the more compact body, the shorter and stouter legs 

 clothed with shorter set£e, 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. 



Nym2yhon mendosum (Hodgson). 



Chwtonymplion mendosum, Hodgson, 1907, p. 30, PL iv, fig. 3, PL 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, oft" Granite Harbour, 50 fathoms ; 7 specimens. 



Remarks. — The form of the chelse in this and some allied species appears to afford 

 diagnostic characters to which sufiicieut 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 movalile finger extends 

 beyond it for a considerable distance, and the teeth of both fingers are widely spaced. 

 In the closely allied N. hiarticidatum 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. N. villosum, again, 

 is in most of these characters intermediate between the two. 



Nymphon australe, Hodgson.* 



N. australe, Hodgson, 1902, p. 257, PL xl. 



Chaetonymplion altioculatum, Mobius, 1902, p. 181, PL xxvi, figs. 1-6. 



Chsetonymphon australe, Hodgson, 1907, p. 32, PL x, fig. 14. 



Ch. australe-yai: austrinorum, Hodgson, t.c. p. 35, PI. iv, fig. 4, PL x, fig. 15. . 



Nymphon stylops, 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. 



