Revision of the Amphipoda Erom South Georgia. 57 



some specimens of an Orchomenopsis from South Africa that seem to me 

 to be hardl) distinguishable from the variable and wide-spread species 

 Orchomenopsis chilensis (HELLER). The other point, fche possession of 

 accessor) branclüal lobes seems hardl) sufficienl tofonn a generic character 

 by itself, for accessory brancniae are developped independentl) in several 

 genera of the Amphipoda belonging to quite differenl families and the) 

 occur, for example, in some species of Hyalella but nol in others. More- 

 over accessor) brancniae are also found in Orchomenopsis chilensis HELLER). 



LTnfortunatel) all the specimens in the „Scotia" collection are of 

 nearl) the same sizeand I therefore have had no opportunit) of ascertaining 

 what changes take place during the growth of the animal; 1 mit judging 

 from the analog) of nearly allied terms I have little doubl that the greal 

 dilatation of the body with the accompanying expansion posteriori) of 

 the fourth side-plate and consequent absence of margination on the inferior 

 margin of the fifth side-plate is less marked in young specimens, and 

 probabl) in a similar way the distal narrowing of the propod of the first 

 gnathopod is besl marked in large and fully grown specimens. 



The species is now known from South Georgia, Graham Land. South 

 Victoria Land and Coat's Land. 



Cheirimedon femoratns (Pfeiler). 



Anonyx femoratus PFEFFER ISS8, p. 93, pl. 2, fig. 2. 



STEBBING 1906, p. sc. 

 Cheirimedon dentimanus CHEVREUX 1906, p. 2, fig. 1 — 4. 

 femoratus CfflLTON 1912, p. 467. 



A comparison of a speeimen of Pfeffer's species with a co-type 

 of .Mi'. CHEVREUX's species kindly placed at inv disposa] has shown that 

 the latter is a synonym of the former. The species has been ver) füll) 

 described and figured b) M. ÜHEVREüX. 



It is known from South Georgia, the South Orkneys and from Graham 

 Land (Porl Charcot, Booth Wandel and Wincke Islands). 



Bovallia monoculoides (Haswell). 



Atylus monoculoides HASWELL 18S0, p. 327, pl. 18, fig. I. 

 Bovallia '/ii/aiifru PFEFFER I8S8, p. 96, pl. 1, tig-. j. 

 Eusiroides monoculoides and E. crassi STEBBING 1906, pp. 345, 346. 

 Bovallia monoculoides CHJLTON 1909, p. 622, and 1912, p. 194. 



This species appears t<. he a variable one and tu Im- very widel) 

 distributed in Subantarctic seas though extending further north both in 



the Atlantic and in the Indian Ocean. L T suall) the last segmenl of the 



