Revision of the Amphipoda from South Georgia. 57 
some specimens of an Orchomenopsis from South Africa that seem to me 
to be hardly distinguishable from the variable and wide-spread species 
Orchomenopsis chilensis (HELLER). The other point, the possession of 
accessory branchial lobes seems hardly sufficient to form a generic character 
by itself, for accessory branchiae are developped independently in several 
genera of the Amphipoda belonging to quite different families and they 
oceur, for example, in some species of Hyalella but not in others. More- 
over accessory branchiae are also found in Orchomenopsis chilensis (HELLER). 
Unfortunately ail the specimens in the „Scotia“ collection are of 
nearly the same size and I therefore have had no opportunity of ascertaining 
what changes take place during the growth of the animal; but judgine 
from the analogy of nearly allied forms I have little doubt that the great 
dilatation of the body with the accompanying expansion posteriorly of 
the fourth side-plate and eonsequent absence of margination on the inferior 
margin of the fifth side-plate is less marked in young specimens, and 
probably in a similar way the distal narrowing of the propod of the first 
enathopod is best marked in large and fully grown specimens. 
The species is now known from South Georgia, Graham Land, South 
Vietoria Land and Coat’s Land. 
Cheirimedon femoratus (Pfeffer). 
Anonyx femoratus PFEFFER 1SSS, p. 95, pl. 2, fig. 2. 
r % STEBBING 1906, p. S6. 
Cheirimedon dentimanus CHEVREUX 1906, p. 2, fig. 1—4. 
* femoratus CHILTON 1912, p. 467. 
A comparison of a specimen of PFEFFER’s species with a co-type 
of Mr. CHEVREUX’s species kindly placed at my disposal has shown that 
the latter is a synonym of the former. The species has been very fully 
described and figured by M. ÜHEVREUXN. 
It is known from South Georgia, the Soutlı Orkneys and from Graham 
Land (Port Charcot, Booth Wandel’ and Wincke Islands). 
Bovallia monoculoides (Haswell). 
Atylus monoculoides HASWELL 1850, p. 327, pl. 15, fig. 4. 
Bovallia gigantea PFEFFER 185S, p. 96, pl. 1, fig. 5. 
Eusiroides monoculoides and E. crassi STEBBING 1906, pp. 345, 346. 
Bovallia monoculoides UHILTON 1909, p. 622, and 1912, p. 494. 
This species appears to be a variable one and to be very widely 
distributed in Subantaretic seas though extending further north both in 
the Atlantie and in the Indian Ocean. Usually the last segment of the 
