50,000 80,000 20,000 *No data except for Culex and non-aquatic forms. 370- 5, 000- 10, Q00- 5,000- 20,000 500- 90,000 600- 3,000 600,000 18,000-1, 250,000 25,000- 100% mortality 10,000-300, 000 8,000-100,000 50% mortality Dose which caused (r) 5 days-80 days 14-460 days 3 weeks-2 years 45 min.-40 days 45 days "Latent" period and Palumbo (1951); and Halberstaedter Halberstaedter (1951). Solberg (1938). Corbella (1930); Welander et al. (1948); Foster et al. Ellinger 7933) 13433 1940); Ssanckhvalova(1938 Bonham and Palumbo (1946). Bonham and Palumbo (3932). Muhsam and Back (1943); Powers and 1950); Feldman Shefner (1945); Halberstaedter and Back Ralston (1939); Back (1939); al. (1947). Crowther (2926) Bonham, et Bonham Investigators Relative Sensitivity of Different Groups of Organisms to Radiation Molluscs Crustaceans Fish Insects* Protozoa Algae Group Table l.

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