CUMULATIVE ABSTRACT INDEX TO BEHAVIOUR.

Presents several abstracts of studies on animal behavior. `Alternative Mechanisms of Social Organization in Monkeys,' by T.E. Rowell and D.K. Olson; `Significance of Song Variation in a Population of Darwin's Finches,' by B.R. Grant; `The Dynamics of Snake Harassment by Black-Tailed Prairie Dogs,' by W.J. Loughry; `Condition Changes and Choice of Social Environment in African Buffalo Bulls,' by H.H.T. Prins.