474 PROFESSOR CHARLES CHILTON ON THE 
Orchoinenopsis proxima Chevreux, 1903, p. 93, fig. 6a—c, and 1906s, p. 13. 
= rossit Walker, 1903a, p. 45, figs. 18-23, and 1907, p. 14. 
(2) e abyssorum Walker, 19038, pp. 224 and 227. 
(2) : 5 Chevreux, 1903, p. 92. 
South Orkneys, Scotia Bay, Station 325; trap, 15 fathoms. May 1903. Several 
hundred specimens up to 15 mm. in length, all “taken from trap in one 
day ; bait—penguin.” Taken along with O. nodimanus. 
Station 411, Coats Land, lat. 74°.1’ S., long. 22° W.; 161 fathoms. 12th 
March 1904. Many specimens, most of them of large size, about 20 mm. 
South Orkneys, Station 325; 21 fathoms. September 1903. ‘‘ Through hole in 
ice made for seal skeleton.” Many hundreds of specimens of varying size 
up to15 mm. Taken along with O. nodemanus. 
South Orkneys, Station 325; 138-25 fathoms. August 1903. Many specimens . 
O. nodimanus being taken at the same time. 
South Orkneys, Scotia Bay ; 9-10 fathoms. May 1903. Many specimens; also 
taken along with O. nodimanus. 
South Orkneys, Station 325; 27 fathoms; temperature 29°. June 1903. Many 
specimens ; O. nodimanus being taken at the same time. 
In order to make clear the discussion of this species it will be well to give the 
following historic account. The genus Orchomenopsis was established by Sars in 1893 
for the species O. obtusa. In 1888 Mr Sreppine had described three species under the 
genus Orchomene, namely :—Orchomene musculosus, described from one specimen about 
12 mm. long, taken near the south of Japan; Orchomene abyssorum, from the Atlantic, 
east of Buenos Aires, 1100 fathoms, one specimen, male; and O. cavimanus, from 
Kerguelen Island, two or three specimens, the one described being 12 mm. long. Of 
these species Sars included the first two, and with some doubt also the third, in his 
genus Orchomenopsis. Many years before this, however, in 1865, Hetimr had de- 
scribed the species Anonyx chilensis from Chili, and in his revision of the Amphipoda 
for Das Tierreich StEBBING puts the whole of his three species under Orchomenopsis, 
giving Anonyx chilensis Heller as a doubtful synonym of O. abyssorwm, and identify- 
ing his species O. cavimanus with Anonyx zschauii Pfeffer, which had been described 
from South Georgia in 1888. In 1903 CuEvreux described Orchomenopsis proxima 
from specimens obtained from deep waters in the tropical Atlantic Ocean, at the same 
time identifying other specimens from the Northern Atlantic with O. abyssorum, and 
describing a new species, O. excavata, which he stated comes close to O. cavimanus 
(Stebbing). In 1906 he identified specimens obtained by the French Antarctic Ex- 
pedition from Graham Land with O. proxvma, pointing out a few small differences 
between the specimens from the two localities, and stating that the species was very close 
to O. obtusa Sars. Meanwhile, in 1903, Waker had described O. rossi from Cape 
Adare, also referring to its close resemblance to O. obtusa; in 1907 he examined many 
specimens obtained from South Victoria Land by the Duscovery Expedition, and 
