508 
BULLETIN OF THE BUREAU OF FISHERIES 
Lund, E. J. 
1921. Oxygen concentration as a limiting factor in the respiratory metabolism of Planaria 
agilis. Biological Bulletin, The Marine Biological Laboratory, Vol XLI, No. 4, 
October, 1921, pp. 203-220, 2 figs. Woods Hole, Mass. 
Mitchell, P. H. 
1914. The oxygen requirements of shellfish. Bulletin, United States Bureau of Fisheries, Vol. 
XXXII, 1912 (1914), pp. 207-222, 1 fig. Washington. 
Nelson, J. 
1916. Copper content of green oysters. Report, Department of Biology, New Jersey State 
Agricultural Experiment Station, 1915 (1916), pp. 246-249. Trenton, N. J. 
Nozawa, A. 
1929. The normal and abnormal respiration in the oyster, Ostrea circumpicta Pils. Science 
Reports, Tohoku Imperial University, Fourth Series (Biology), Vol. IV, fasc. 2, 1929, 
pp. 315-325. Tokyo and Sendai, Japan. 
Powers, Edwin B. 
1921. Experiments and observations on the behavior of marine fishes toward the hydrogen-ion 
concentration of the sea water, in relation to their migratory movements and habitat. 
Publications, Puget Sound Biological Station, Vol. 3, 1921-25 (1925), pp. 1-22, 4 pis. 
Seattle. 
1922. The physiology of the respiration of fishes in relation to the hydrogen-ion concentration 
of the medium. Journal of General Physiology, vol. 4, No. 3, 1922, pp. 305-317. 
Baltimore. 
Ranson, G. 
1927. L’absorption de matures organiques dissoutes par la surface ext6rieure du corps chez les 
animaux aquatiques. Annales de l’lnstitut Ocdanographique, Tome IV, Fasc. Ill, 
1927, pp. 49-174. Paris. 
Ryder, J. A. 
1882. Notes on the breeding, food, and green color of the oyster. Bulletin, United States Fish 
Commission, Vol. 1, 1881 (1882), pp. 403-419. Washington. 
Shelford, V. E., and E. B. Powers. 
1915. An experimental study of the movements of herring and other fishes. Biological Bulletin, 
Marine Biological Laboratory, Vol. XXVIII, 1915, pp. 315-334. Woods Hole, Mass. 
Thunberg, J. 
1905. Der Gasaustausch einiger niederer Thiere in seiner Abhangigkeit vom Sauerstoffpartial- 
druck. Skandinavisches Archiv fur Physiologie, Bd. XVII, 1905, pp. SS 133-195. 
Leipzig. 
Wells, M. M. 
1913. The resistance of fishes to different concentrations and combinations of oxygen and 
carbon dioxide. Biological Bulletin, Marine Biological Laboratory, Vol. XXV, 
No. 6, 1913, pp. 323-347. Woods Hole, Mass. 
1918. The reactions and resistance of fishes to carbon dioxide and carbon monoxide. Bulletin, 
Illinois State Laboratory of Natural History, Vol. XI, 1915, 1917, 1918 (1918), pp. 
557-571, 1 fig., 1 chart. Urbana. 
Yonge, C. M. 
1926. Structure and physiology of the organs of feeding and digestion in Ostrea edulis. Journal, 
Marine Biological Association of the United Kingdom, Vol. XIV, No. 2, N. S., August, 
1926, pp. 295-386, 42 text figs. London. 
1928. The absorption of glucose by Ostrea edulis. Journal, Marine Biological Association of 
the United Kingdom, Vol. XV, No. 2, N. S., April, 1928, pp. 643-653, 1 fig. London. 
