20. Supplemental notes on fit^hct; of thu Gulf or Llaino. by 



Honry B. Bigolow and V.illium G. Schroedur. Bullutln 

 of tho Burouu of FitihcridS, Department of Conmerc©, 

 vol. :XVII1, pp. 319-343, 1936 (1940). 



21. Adaptation of the feuding mecLuniiim of the oyatur ( Osti-ea gteaa ) 



to changes in salinity. By A. E. Hopkins. Bulletin of 



the Bureau of Fisheries, Department of Gommerce, vol, XLVIII, 



pp, 345-364, 11 figs,, 1936 (1940). 



22. Detection and measureraont of stream pollution. By M, M, Ellis, 



Bulletin of the Bureau of fisheries, Department of Gommerce, 

 vol. ]a,VIlI, pp, 365-437, 22 figs,, 1936 (1940). 



23. Experimental observations on spavming, larval development, 



and setting in the Olympia oyster Ostrea lurida. By A, E. 

 Hopkins. Bulletin of the Bureau of Fisheries, Department of 

 Commerce, vol, XLVIII, pp. 439-503, 41 figs,, 1937 (1940). 



24. Fjorther notes on the development and life history of some 



teleosts at Beaufort, N, C, By Samuel F, Hildebrand and 

 Louella E. Cable. Bulletin of the Bureau of Fisheries, 

 Department of Corcaierce, vol, XLVIII, pp. 505-642, 159 figs,, 

 1938 (1940). 



25. The migration of pink salmon ( Oncorhynchus gorbuscha ) in the 



Clarence and Sumner Straits regions of Southeastern Alaska. 

 By Frederick A. Davidson and Leroy S. Christey. Bulletin 

 of the Bureau of Fisheries, Department of Commerce, vol. XLVIII, 

 pp. 643-666, 5 figs., 1938 (1940). 



26. The geographic distribution and environniental limitations of 



the Pacific salraon CGenua Oncorhynchus ) , By Frederick A. 

 Davidson and Samuel J", Hutchinson. Bulletin of the Bureau 

 of Fisheries, Departmsnt of Commerce, vol, XLVIII, pp. 667-692, 

 9 figs,, 1938 (1940), 



27. The salmon and the salmon fisheries of Svjiftsure Bank, Puget 



Sound, and the Fraser River. By George A. Rounsefell and 

 George B, Kelez. Bulletin of the Bureau of Fisheries, 

 Department of Commerce, vol, XLVIII, pp, 693-823, 29 figs., 

 1938 (1940), 



28. The life history of the striped bass, or rockfish, Roccus 



saxatilis (Walbaum) , By John C. Pearson. Bulletin of the 

 Bureau of Fisheries, Department of Commerce, vol, XLVIII, 

 pp. 825-851, 26 figs., 1938 (1940). 



29. Effect of currents on distribution and survival of the eggs 



and larvae of the haddock ( Melonogrammus aeglefinus ) on 

 Georges Bank, By Lionel A. V.'alford. Bulletin of the Bureau 

 of Fisheries, Department of Commarce, vol. XLIX, pp. 1-73, 

 50 figs., 1938 (1950). 



116 



