CIRCADIAN RHYTHMS IN ANIMAL PHYSIOLOGY HARKER, J. Endocrine and Nervous Factors in Insect Circadian Rhythms 279 HALBERG, F. Temporal Coordination of Physiologic Function 289 HELLBRÃœGGE, TH. The Development of Circadian Rhythms in Infants 311 LOBBAN, M. C. The Entrainment of Circadian Rhythms in Man 325 MORI, S. Analysis of Environmental and Physiological Factors on the Daily Rhythmic Activity of a Sea Pen 333 ECOLOGICAL ASPECTS OF CIRCADIAN RHYTHMS CLOUDSLEY-THOMPSON, J. L. Adaptive Functions of Circadian Rhythms 345 CORBET, P. S. Patterns of Circadian Rhythms in Insects 357 RENNER, M. The Contribution of the Honey Bee to the Study of Time-Sense And Astronomical Orientation 361 CHRONOMETRY IN CELESTIAL ORIENTATION Dedication to Gustav Kramer 369 LINDAUER, M. Time-Compensated Sun Orientation in Bees 371 HOFFMANN, K. Experimental Manipulation of the Orientational Clock in Birds 379 SCHMIDT-KONIG, K. Internal Clocks and Homing 389 PARDI, L. Innate Components in the Solar Orientation of Littoral Amphipods 95 BIRUKOW, G. Innate Types of Chronometry in Insect Orientation 403 BRAEMER, W. A Critical Review of the Sun-Azimuth Hypothesis 413 HASLER, A. D., AND H. O. SCHWASSMANN. Sun Orientation of Fish at Different Latitudes 429 SCHWASSMANN, H. O. Environmental Cues in the Orientation Rhythm of Fish 443 WALLRAFF, H. G. Does Celestial Navigation Exist in Animals? 451 SAUER, F., AND E. SAUER. Star Navigation of Nocturnal Migrating Birds 463 PAPI, F. Orientation by Night: The Moon 475 LONGER PERIODICITIES FINGERMAN, M. Tidal Rhythmicity in Marine Organisms 481 HAUENSCHILD, C. Lunar Periodicity 491 MARSHALL, A. J. Annual Periodicity in the Migration and Reproduction of Birds 499 WOLFSON, A. Regulation of Annual Periodicity in the Migration and Repro- duction of Birds 507
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