CHEMISTRY OF THE SEA 175 



currents carry the poisonous gas into the upper levels, the animals 

 there may be killed. In the summer of 1911 the entire Mytilus culture 

 at Ganzini near Messina died out because the ooze was stirred up by 

 a current. 23 A number of reports of great mortality in the fishes of the 

 Gulf of Guinea are on record. In the Norwegian "Polls," when the 

 cover of ice prevents the oxygenation of the water, the hydrogen sul- 

 phide may reach the uppermost levels and spoil the oysters, which are 

 kept there in baskets. 24 



BIBLIOGRAPHY 



1) Ritter-Zahony, 1911, Erg. Plankton Exped., 2, Heft. He, p. 21.— 2)* Ma- 

 rion, 1885, Ac. sc. Marseille.— 3) Dechow, 1920, Die Bodentiere des Kaiser-Wilh.- 

 Kanals, (Diss. Kiel).— 4) Ihering, 1907, Archelenis und Archinotis, p. 520 ff.— 5) 

 Murray & Irvine, 1889, Proc. Roy. Soc. Edinburgh, 17, p. 79 ff.— 6) Pruvot, 1896, 

 Annee Biol., 2, p. 565 ff.— 7) Murray, 1895, CR. 3. Cgr. Int. Zool., Leyden, p. 99- 

 111.— 8) Murray & Hjort, 1912, Depths of the Ocean, p. 258.-9) Atkins, 1923. 

 J. Mar. Biol. Assoc, 13, p. 113.— 10) Brandt, 1899, Wiss. Meeresunters., Kiel, 

 (NF) 4, p. 213-248; idem, 1902, 6, p. 25-79; idem, 1916, 18, p. 185-429; idem, 1921, 

 Festschr. Preuss. Komm. Unters. Meere, p. 7-33.— 11) Krogh, 1934, Ecol. Monogr., 

 4. p. 430.— 12) Puff, 1890, Das kalte Auftriebwasser usw. (Diss. Marburg), p. 56 ff. 

 & p. 93 ff.— 13) Brandt, 1920, Naturwiss. 8, p. 286 ff.— 14) Darwin, 1884, J. Re- 

 searches etc., new ed., p. 239.— 15) Brandt, 1921, Festschr. Preuss. Komm. Unters. 

 Meere, p. 27.— 16) Agassiz, A., Bull. Mus. Comp. Zool., 21, p. 185 ff.; idem, 

 1900, Petermanns Mitt., 46, p. 72.— 17) Mitsukuri, 1898, Proc. 4. Int. Zool. Cgr., 

 Cambridge, p. 109.— 18) Chun, 1900, Tiefen des Weltmeers, p. 449.— 19) Gran 

 & Braarud, 1935, J. Biol. Bd. Canada, 1, p. 280.— 20) Drechsel, 1914, CR. 9. Int. 

 Zool. Cgr., Monaco, p. 123-129.— 21) Reibisch, 1914, Verh. D. zool. Ges., p. 233.— 

 22) Knipowitsch, 1895, Bull. Acad. Sc, St. Petersbourg, Dez. Teil, 3. No. 5, p. 

 459-473.-23) Wilhelmi, 1912, K. Landesanst. Wasserversorgung, Berlin, He. 16, 

 p. 160.— 24) Helland-Hansen, 1908, Int. Rev. Hydrob., 1, p. 570. 



* Reference not found. 



