1. Reciprocal food sharing of gibbons

   • Gershon Berkson
   • Ronald J. Schusterman

   OriginalPaper Pages: 1 - 10

2. Report of the preliminary survey on the orang-utan in North Borneo

   • Kenji Yoshiba

   OriginalPaper Pages: 11 - 26

3. Social changes of Japanese monkey troops in the Takasakiyama

   • Hiroki Mizuhara

   OriginalPaper Pages: 27 - 52

4. Morphological studies ofMacaca fuscata

   • Mitsuo Iwamoto

   OriginalPaper Pages: 53 - 73

5. Peripheral blood of wild Japanese monkeys

   • Mutsumi Inoue
   • Chitoshi Itakura
   • Sugio Hayama

   OriginalPaper Pages: 75 - 112

6. The pterion in macaques

   • Mitsuo Iwamoto
   • Sugio Hayama

   Communication Pages: 113 - 116

7. Postscript by the editor

   EditorialNotes Pages: 117 - 118

8. Dr. Keizo Shibusawa 1896–1963

   OriginalPaper Pages: ii - ii