1. The gibbons of the Malay Peninsula and of Sumatra

   • John E. Frisch

   OriginalPaper Pages: 297 - 310

2. Learning and perception of oddity problems by lemurs and seven species of monkey

   • Roger T. Davis
   • Robert W. Leary
   • Richard F. Thompson

   OriginalPaper Pages: 311 - 322

3. Notes on pregnancy, delivery, and infant survival in captive squirrel monkeys

   • Sigrid Hopf

   OriginalPaper Pages: 323 - 332

4. The social structure of the Oregon troop of Japanese macaques

   • Bruce K. Alexander
   • J Michael Bowers

   OriginalPaper Pages: 333 - 340

5. The role of social tradition in the maintenance of dominance in a wild rhesus group

   • Charles H. Southwick
   • M. Rafiq Siddiqi

   OriginalPaper Pages: 341 - 353

6. The social unit of chimpanzees

   • Junichiro Itani
   • Akira Suzuki

   OriginalPaper Pages: 355 - 381

7. Bibliography of the studies on non-human primates in Japan 1966

   OriginalPaper Pages: 383 - 388

8. Reviews

   • John Frisch

   ReviewPaper Pages: 389 - 390

9. Postscript by the editor

   EditorialNotes Pages: 391 - 392