1. Message from the Editor-in-Chief

   • Yukimaru Sugiyama

   Editorial 10 December 2002 Pages: 1 - 1

2. Difference in food selection between patas monkeys (Erythrocebus patas) and tantalus monkeys (Cercopithecus aethiops tantalus) in Kala Maloue National Park, Cameroon, in relation to nutrient content

   • Naofumi Nakagawa

   Original Article Pages: 3 - 11

3. Positional behavior of free-ranging Japanese macaques (Macaca fuscata)

   • Kaoru Chatani

   Original Article Pages: 13 - 23

4. Three acoustic forms of Allen's galagos (Primates; Galagonidae) in the Central African region

   • Lesley Ambrose

   Original Article Pages: 25 - 39

5. Comparative morphology of the hyo-laryngeal complex in anthropoids: two steps in the evolution of the descent of the larynx

   • Takeshi Nishimura

   Original Article Pages: 41 - 49

6. Altitudinal and seasonal variations in the diet of Japanese macaques in Yakushima

   • Goro Hanya
   • Naohiko Noma
   • Naoki Agetsuma

   Original Article Pages: 51 - 59

7. Increase in tannin consumption by sifaka (Propithecus verreauxi verreauxi) females during the birth season: a case for self-medication in prosimians?

   • Valentina Carrai
   • Silvana M. Borgognini-Tarli
   • Massimo Bardi

   Original Article Pages: 61 - 66

8. Successful reproduction in wild-released orphan chimpanzees (Pan troglodytes troglodytes)

   • Benoît Goossens
   • Joanna M. Setchell
   • Aliette Jamart

   Short Communication Pages: 67 - 69

9. Long distance mobility of male Japanese macaques evidenced by mitochondrial DNA

   • Ikuya Yoshimi
   • Hiroyuki Takasaki

   Short Communication Pages: 71 - 74