of the Fishery Board for Scotland. 



213 



The eyes are lageniform, and, being large and black, give a marked 

 character to the species. 



Genus Bathyporeia, Lindstrom (1855). 



Bathyporeia norvegica, G. 0. Sars. (PI. V. fig. 22.) 

 Bathyporeia pilosa, Boeck (not Lindstrom). 



1891. Bathyporeia norvegica, G. 0. Sars, loc. cit., p. 128, pi. 43, 



1892. Bathyporeia norvegica, T. and A. Scott, 'Ann. and Mag. 

 ' Nat. Hist.,' s. 6, vol. x. p. 205. 



Specimens of this species are occasionally obtained in various parts of 

 the Firth of Forth. It may be distinguished by its larger size, and espe- 

 cially by the tooth-like form of the postero-lateral angles of the epimeral 

 plates of the third metasome. 



Bathyporeia pelagica, Sp. Bate. (PI. V. figs. 23-25.) 



1862. Bathyporeia pelagica, Sp. Bate, 'Cat. Amphip. Brit. Mus.,' 



p. 174, pi. xxxi. fig. 6. 

 1891. Bathyporeia pelagica, G. O. Sars, op. cit., p. 129, pi. 44, 



fig. 1. 



After a careful examination of a considerable number of Forth speci- 

 mens of Bathyporeia, I have been enabled, with the assistance of Prof. 

 G. 0. Sars' ' Crustacea of Norway,' to distinguish this and the following 

 species. The exceedingly long flagellum of the posterior antennae of the 

 adult male enables Bathyporeia pelagica to be readily distinguished 

 except from Bathyporeia norvegica ; but in this case, not only is there a 

 difference in size, there is also the difference in the form of the epi- 

 meral plates of the third metasome, which, in all but Bathyporeia 

 norvegica, have postero-lateral angles more or less rounded. In Bathy- 

 poreia pelagica the dorsal flexure of the first urosome is very marked, and 

 the four small submedian seta3 on its lower convex portion are present on 

 all the specimens observed in the Forth ; the two lower ones are short, 

 stout, and distinctly spiniform. 



Bathyporeia robertsoni, Sp. Bate, (PI. V. figs. 26-29.) 



1862. Bathyporeia robertsoni, Sp. Bate, ' Cat. Amphip. Brit. Mus.,' 



p. 173, pi. xxxi. fig. 5. 

 1891. Bathyporeia robertsoni, G. O. Sars, op. cit., p. 131, pi. 44, 



fig. 2. 



In this species the flagellum of the adult male posterior antennae is 

 comparatively short, and the first urosome wants the two posterior sub- 

 median dorsal spiniform setse ; it also differs in having the last joint of 

 the last pair of uropods very small. In the ' Revised List of the Crus- 

 ' tacese of the Firth of Forth,' Bathyporeia pelagica and Bathyporeia 

 robertsoni are included under Bathyporeia pilosa, Lindstrom, as forms of 

 that species. 



Genus Argissa, Boeck (1870). 



Argissa hcmiatipes (Norman). (PI. V. figs. 30, 31.) 



1868. Syrrhoe hamatipes, Norman, Report on Dredging among 

 the Shetland Islands (in ' Report of the 38th Meeting of the 

 ' British Association, 1868,' London, 1868). 



1870. Argissa typica, Boeck, 'Crust. Amphip. bor. et arct.,' p. 45. 



1891. Argissa typica, G. O. Sars, op. cit., p. 141, pi. 48. 



This curious and somewhat anomalous Amphipod has been observed 

 during the past autumn and winter in various parts of the Forth. It has 



