446 



year 1830 as Amphithoi^ Jitrinii. and was subsequently described and figured 

 in his well-known work on the Crustacea. The Amphifhoe norvegica of Rathke 

 is undoubtedly identical with M-Edwards' species, and this is also the case 

 with the form described by Sp. Bate in his Catalogue of Amphipoda in the 

 British Museums as Phrrusa furicola Leach'); but the Anipliipod he sub- 

 sequently describes and figures under the same name in his work on the 

 British sessile-eyed Crustacea, from the type specimen of Leach, is evidently 

 an entirely different form. Mr. Walker has first called attention to this fact 

 and has shown, that the Fherusa fucicola of Leach is indeed nothing else than 

 the female of Gammarella hrevicaudafa, M. Edw., a form which does not even 

 belong to the same family. Under such circi\mstances, the Leachian species 

 must be cancelled altogether, and even his genus Fherusa discarded from the 

 Zoology, as founded on a misapprehension. It is on these suggestions that 

 Mr. Walker has restored the specific name proposed by M-Edwards and 

 changed the generic name Phernsa to ApJienisa. I quite agree with that 

 author, that this species cannot properly be referred to the genus CdlUopius, 

 as proposed by Boeck, differing, as it does, very markedly both in the 

 structure of the antennae, and in that of the gnathopoda On a closer 

 anatomical examination of the animal, 1 have not found any essential 

 characteristics whatever, to warrant its generic separation from the 4 species 

 descriljcd in tlie preceding pages, and the genus Apliemsa has therefore been 

 extended to include also these forms. From the latter the present species is 

 at once distinguished by the absolute want of any dorsal projections. 



Occurrence. — I have only met with this form in a single locality 

 off the Jaederen coast, where it occurred not rarely in quite shallow water 

 among algae. Rathke collected it at Christiansund, and Boeck records it 

 also from Haugesund. 



Bistrihuticm. — British Isles (Sp. Bate), Kattegat (Meinert), coast of 

 France (Chevreux), Mediterranean (Chevreux). 



Gen. 4. Calliopius, Lilljeb. 18(55. 

 Syn.: Calliope, Sp. Bate. 



Body comparatively strongly built, with none of the segments produced 

 dorsally. Cephalon witli a rather small rostral projection, and having the 

 postantennal corners scarcely at all produced. Coxal plates of moderate size, 



') As pointed out bj' Mr. Walkor, the ligure lefeiTing to this form is not fig. 9, as stated 

 l)oth in the text and the plate, but (ig. 10. 



