1. Announcement

   Announcement Pages: 391 - 391

2. Grooming interactions among adult chimpanzees at Bossou, Guinea, with special reference to social structure

   • Yukimaru Sugiyama

   OriginalPaper Pages: 393 - 407

3. Triadic interactions in Savanna-dwelling baboons

   • Euclid O. Smith
   • Patricia L. Whitten

   OriginalPaper Pages: 409 - 424

4. Vervet monkey grandmothers: Interactions with infant grandoffspring

   • Lynn A. Fairbanks

   OriginalPaper Pages: 425 - 441

5. Menstrual-cycle phase and sexual behavior in semi-free-ranging stumptail macaques (Macaca arctoides)

   • Horst D. Steklis
   • Robin Fox

   OriginalPaper Pages: 443 - 456

6. The diet of the olive colobus monkey,Procolobus verus, in Sierra Leone

   • John F. Oates

   OriginalPaper Pages: 457 - 478

7. Strategic responses of male samango monkeys (Cercopithecus mitis) to a decline in the number of receptive females

   • S. P. Henzi
   • M. Lawes

   OriginalPaper Pages: 479 - 495

8. Comparative primate biology, Volume 2, Part A. Behavior, conservation and ecology. Edited by G. Mitchell and J. Erwin. Alan R. Liss

   • David J. Chivers

   Book Review Pages: 497 - 499

9. Announcements

   Announcement Pages: 501 - 501