Series 



*SSR 24. Studies on the Pacific pilchard or 

 sardine, ( Sardinops Caerulea). 5 - A 

 method of coniputing mortalities and 

 replacements, by Ralph P. Silliman. 

 1943. 10 p. , illus. Reissued as part of 

 SSR-F 15, May 1950. 



*SSR 25. Outlook for the Alaska herring 



fishery in 1944, by E. H. Dahlgren and 

 L. N. Kolloen. 1944. 18 p. 



*SSR 26. Supplementary report on investiga- 

 tions of fish -salvage problems in relation 

 to Shasta Dam, by Paul R. Needham, 

 Harry A. Hanson, and Lewis P. Parker. 

 June 1943. 50 p. , illus. 



*SSR 27. The retention of adult salmon with 

 particular reference to the Grand Coulee 

 fish-salvage program, by Frederick F. 

 Fish. 1944. 29 p. , illus. 



*SSR 28. Harbor seals and sea lions in Alaska, 

 by Ralph H. Imler and Hosea R. Sarber. 

 Apr. 1947. 23 p. , illus. 



*SSR 29. The condition of the natural oyster 

 reefs and other public oyster bottoms of 

 Alabama in 1943 with suggestions for their 

 improvement, by James B. Engle. 1945. 

 42 p. , illus. 



*SSR 30. Water quality studies of the Missis- 

 sippi river, by Wesley S. Platner. 1946. 

 77 p. , illus. 



*SSR 31. Studies of icthyosporidian-like 



parasite of oceanpout, (Zoarces anguil- 

 laris), by Leslie A. Sandholzer. Thomas 

 Nostrand and Leo Young. 1945. 12 [11] 

 p. , illus. 



*SSR 32. Oyster bars of the Potomac River, by 

 David G. Frey. Nov. 1946. 93 p. , illus. 



*SSR 33. An investigation of fish maintenance 

 problems in relation to the Willamette 

 Valley project, by Joseph A. Craig and 

 Lawrence D. Townsend. 1946. 78 1. , 

 illus. 



*SSR 34. Intraseasonal and interseasonal varia- 

 tions in average weight of Columbia River 

 Chinook salmon, (Oncorhynchus tschawyt- 

 scha), by Ralph P. Silliman, Willis H. 

 Rich and Floyd G. Bryant. Feb. 1947. 

 11, [20] p. , illus. 



*SSR 35. § 



*SSR 36. Studies on substitute containers for 

 canned fishery products, by Norman D. 

 Jarvis and Lynne G. McKee. 1948. 26 p. 



*SSR 37. Studies on gum extracts from Graci- 

 laria confervoides (North Carolina), by 

 Charles F. Lee and Leonard S. Stoloff. 



1946. 11 p. , illus. 



*SSR 38, Water quality studies of the Delaware 

 River with reference to shad migration, by 

 M. M. Ellis, B. A. Westfall, D. K. 

 Meyer and W. S. Platner. Feb. 1947. 19, 

 [37] p. , illus. 



*SSR 39. Effects of aquatic weed infestations 

 on the fish and wildlife of the Gulf states, 

 by J. J. Lynch, J. E. King, T. K. Cham- 

 berlain and Arthur L. Smith, Jr. Feb. 



1947. 71 p. 



"SSR 40. Evaluation of fisheries in determining 

 benefits and losses from engineering 

 projects, by Richard A. Kahn and George 

 A. Rounsefell. Mar. 1947. 10 p. 



*SSR 41. DDT investigations by the Fish and 

 Wildlife Service in 1946, by Arnold L. 

 Nelson and Eugene W. Surber. May 1947. 

 8 p. 



*SSR 42. Toxicity of phenyl-mercuric lactate 

 for fish, by M. M. Ellis. May 1947. 6 p. 



SSR 43. § 



*SSR 44. Echo-ranging for fish schools and ob- 

 servations on temperature and plankton in 

 waters off central California in the spring 

 of 1946, by Osgood R. Smith and Elbert H. 

 Ahlstrom. Feb. 1948. 30 p. , illus. 



SSR 45. § 



*SSR 46. Red tide; progress report on the in- 

 vestigations of the cause of the mortality 

 of fish along the west coast of Florida 

 conducted by the U. S. Fish and Wildlife 

 Service and cooperating organizations, by 

 Pauls. Galtsoff. Feb. 1948. 44 p. , 

 illus. 



*SSR 47. Development of fishery statistics in 

 the North Atlantic, by George A. Rounse- 

 fell. Feb. 1948. 18 p. , illus. 



»SSR 48-49. § 



*SSR 50. Estimation of the troll catch of Co- 

 lumbia River Chinook salmon, Oncorhyn- 

 chus t schawytscha , by Ralph P. Silliman. 

 May 1948. 15, [18] p. , illus. 



104 



