8 Transactions. 



The terminal segments of the pleon are dentate as in E. thomsoni 

 Stebbing, to which I was at first inclined to refer my specimens, and, indeed, 

 the two species may possibly prove to be identical ; in the meantime, 

 however, I have not been able to satisfy myself on this point. 



Chevreux' specimens were from the Azores. It should be remembered 

 that another, quite different, species from Alaska was described under the 

 same name b}^ Holmes in 1908 ; for this Stebbing has suggested the name 

 alaskensis (1910, p. 613). 



The specimens that I refer to E. dentatus (Chevreux) are from Cook 

 Strait ; off Cape Saunders ; Stewart Island ; and the Kermadec Islands. 

 If I am correct in my identifications, it is also found at Gough Island 

 and at the Azores. 



Paracorophium excavatum (G. M. Thomson). 

 CorojjJiium excavdtum G. M. Thomson, 1884, p. 236, pi. 12, figs. 1-8. 

 Paracorophium excavatum Stebbing, 1906, p. 664 ; Chilton, 1906, 

 p. 704. 



This species was described by Mr. Thomson from specimens taken in 

 Brighton Creek, near Dunedin. Since then it has been found in several 

 localities around the New Zealand coast where the water is more or less 

 brackish, and also in the fresh-water lake Rotoiti, in Auckland. In 1918 

 some amphipods were sent me from brackish water in Brisbane River, 

 Queensland, where they had been collected, along with the destructive 

 wood-boring isopod Sphaeroma terebrans Bate, by Dr. T. Harvey Johnston, 

 and these prove to belong to the same species. The males are distinguished 

 from the females by a lobe on the end of the penultimate joint of the 

 peduncle of the lower antenna, and by a differently shaped second 

 gnathopod. The form originally figured by Thomson is an immature male. 

 I have redescribed the species and given an account of the development of 

 the sexual characters in a paper which will shortly be published in the 

 Queensland Museum Memoirs, vol. vii. 



The occurrence of the species in brackish waters in New Zealand and 

 also in northern Australia is of considerable interest. 



List of Authors quoted. 



Chevreux, E., 1900. Res. Campagnes scientifiques par Albert i'''' de Monaco, Fasc. 16. 



1906. Exped. Antarr.t. franraise, 1903-5, Amphipodes- 



■ 1913. Deuxieme Exped. Antarct. francaise, Amphipodes. 



Chilton, C, 1884. Trans. N.Z. Inst., vol.' 16, p. 259. 



— - 1906. P.Z.S., 1906, pp. 702-5. 



1909. Subant. Islands N.Z., Crustacea, pp. 601-71. 



1912. AmphiiJ. Scottish Nat. Antarct. Exped., Trans. Roy. Soc. Edin.. vol. 48, 



pp. 455-519. 

 1916. Ann. Mag. Nat. Hist., ser. 8, vol. IS, p. 199. 



1917. Jour. Zool. Research, vol.' 2, p. 75. 



Dell A Valle, A., 189.'}. Faxma u. Flora Goljes von Neapel, Monogr. 20, Qammarinu 

 Haswell, W. a., 1879. Rroc. Linn. Soc. N.S.W., vol. 4, pp. 319-50. 



1880. Loc. cit., vol. 5, p. 103. 



Stebbing, T. R. R., 1888. Rep. " Challenger " Amphipoda. 

 1899. Ann. Mag. Nat. Hist., ser. 7, vol. 3, ]). 350. 



-- 1906. Das Tierreich Antphipoda. 



1910. "Thetis" Amphipoda, Mem. Austral. Mus., iv, pp. 567-658. 



Thomson, G. M., 1879. Trans. N.Z. Inst., vol. 11, pp. 231-48. 



1880. Ann. Mag. Nat. Hist., ser. 5, vol. 6, pp. 1-6. 



1897. Loc. cit., 'ser. 6, vol. 20, pp. 446-51. 



Thomson, G. M., and Chilton, C, 1886. Trans. N.Z. Inst., vol. 18, pp. 141-59. 

 Walker, A. O., 1903. "Southern Cross" Amphipoda, Jo%ir, Linn. Soe., vol. 29, 



pp. 37-64. 

 1907. Amphipoda, Nat. Antarct. Exped., 1901-4. vol. 3, pp. 1-39. 



