462 PROFESSOR CHARLES CHILTON ON THE 
NORTHERN AND TROPICAL ATLANTIC. 
Name or SpEcigs. DistRIBUTION AND REMARKS. 
1. Synopta schéeleana Bovallius. Pacific and Atlantic Oceans. 
2. Hyale grimaldii Chevreux. North Atlantic. 
3. Allorchestes plumicornis (Heller). Mediterranean and North Atlantic. 
4. Sunamphitoe pelagica (Milne Edwards). North Atlantic. 
5. Anchylomera blossevillit Milne Edwards. Tropical Atlantic. 
6. Oxycephalus clausi Bovallius. Tropical Atlantic and (?) Pacific. 
Ill. Anrarcric AND SUB-ANTARCTIC SPECIES. 
Genus Acontriostoma Stebbing, 1888. 
Acontiostoma marionis Stebbing. 
1. Acontiostoma marionis Stebbing, 1888, p. 709, pl. xxx.* 
- 3 4) 1906, p. 15, fig. 4. 
oh magellanicum Stebbing, 1888, p. 714, pl. xxxi. 
1906, p. 15. 
ed} ” ” 
Station 461, Gough Island; 100 fathoms. 23rd April 1904. One specimen, 
7 mm. long, 5 mm. high. 
This specimen agrees well with the description and figures given by Stespine. As 
| have only the single specimen, I have not dissected it, but the maxillipeds can be seen 
to agree with his description, while the shape of the third uropod and of the telson with 
its fringe of stout spines leaves no doubt as to the identity of the species. 
A. magellanicum Stebbing is, as Mr Sreppine has pointed out, almost certainly the 
young of this species, which is now therefore known from Marion Island, Gough Island, 
and Straits of Magellan. 
Among the Amphipoda that I brought with me from New Zealand for examination 
[ have a slide from Mr G. M. THomson’s collection that undoubtedly belongs to this 
genus, and is, I think, not specifically distinet from A. marions. It has the upper 
antenne and the first gnathopod rather stouter than is shown in Mr SresBina’s 
figure ; but the peculiar second gnathopod, with the finger sunk in a little cavity at the 
end of the propod, and the uropoda and telson, agree very closely with the Challenger 
specimen. In some points it approaches rather nearer to A. magellancum, and tends 
to confirm the view that that species is only the young of A. marionas. 
This slide was mounted by Mr THomson from one of a very small number of 
specimens collected in Lyttelton Harbour by myself about the year 1884, and handed to 
him in 1895 when I left New Zealand for a lengthy period. When living, the animals, 
which were all of very small size, were bright red in colour. I had dissected and 
mounted a slide of one of the other specimens about that date, and I have a drawing 
* The references are made by the year of publication to the works giyen in the Bibliography on pp. 517 and 518. 
1 have given only those references that appeared to be necessary for the purpose of the present paper. 
