THE GREAT APES

By ROBERT M. YEHKES AND ADA W. YERKES, Yale University Press.

This illustrated volume is a useful catalogue of psychobiological research among anthropoid apes in captivity. It is a digest of the works of all of the most important research workers who have used the anthropoid apes as subjects. A single thesis or hypothesis is not supported alone but is presented pro and con with the views of various scientists collaborated.

The book is divided into six parts, Historical, Gibbon, Orang-Outan, Champanzee, Gorilla, Comparisons and Conclusions. The first part treats the history of our scientific knowledge of the apes. The next four parts are concerned with the respective animals, their distribution, life history, psychological and physiological behavior, as well as other aspects which have become the object of scientific investigation. The various individuals which have been observed in captivity are described by their observers. It also contains a complete bibliography for the natural history and psychobiology of the anthropoid apes to 1928. This a is most finished and unbiased treatise on our present day knowledge of anthropoid apes.

Department of Zoology.