AMPHIPODA OF THE SCOTTISH NATTONAI. ANTARCTIC EXPEDITION. 181 



made at the time of the second gnatliopod which closely corresponds with that given by 

 Stebbing of the Challenger specimen. 



Since this was written I have been able to compare Mr Thomson's slide with those 

 of the Challenger specimens in the British Museum. Tlie Challenger specimen of 

 A. marionis is considerably larger than the New Zealand specimen, and, as stated above, 

 has the first gnathopod more slender ; but the differences are not, I think, of specific 

 importance. The dissected parts of the small specimen of A. rnagellanicum are now so 

 transparent that they are difiicult to examine, but so far as they can be made out they 

 seem to agree generally with A. marionis. 



A. pepinii Stebbing, obtained by the Challenger at Kerguelen Island, was placed by 

 Mr Stebbing in a new genus, Stomacontion, in 1899, and A. kergueleni Stebbing made 

 a synonym of A. pepinii. 



It seems, however, to be too ne;ir to A. marionis to be separated generically. Un- 

 fortunately, the very minute mouth parts do not show very clearly in Mr Thomson's 

 prepared slide, and I cannot make out whether the first maxilla in it has the palp one- or 

 two jointed ; but the palp of the maxillipeds certainly seems to have the fourth joint 

 quite vestigial or absent, as described for Stomacontion ; in Acontiostoma it is " very 

 small." There seems to me to be no essential difierence between the two g-enera in the 

 third uropods. 



Genus Amaryllis Haswell, 1880. 



Amaryllis macrophthalma Haswell. 



Amaryllis macrophthahnus and A. hrevicomis Haswell, 1880a, p. 253, pi. viii. fig. 3, and p. 254. 

 ,, macrojMhalma Stebbing, 1888, p. 707, pi. xxix. 



1906, p. 24. 

 1908, p. 67. 

 „ „ „ 1910a, pp. 569 and 633. 



„ „ „ 1910b, p, 448. 



Walker, 1909, p. 327. 



Station 483, South Africa, entrance to Saldanha Bay ; trawl, 25 fathoms. 

 2 1st May 1904. Five specimens, the largest 9 mm. long. 



These specimens agree well with the short description given in Das Tierreich, and 

 illustrate several of the points in Stebbing's further description given in the reference 

 quoted above, 1908, p. 67. 



Another species, A. bathycephala Stebbing, has been described from Port Philip, 

 Australia, and is evidently very closely allied, differing mainly in the side plate and 

 basal joint of the third perasopod. In my specimens the hind lobe of the side plate is 

 more produced downwards than in Stebbing's figure of J. macrophthalma, and thus is 

 a little more like A. hathyrephala, but on the other hand the basal joint of the limb is 

 expanded above instead of being narrowed as in the latter species. 



The species is now known from Australia, South Africa, Straits of Magellan, and 

 New Zealand, and Mr Walker has recorded it from Wasin, British East Africa. In 



(ROY. SOC. EDIN. TRANS., VOL. XLVIlf., 4G3.) 



