1. Institute of Anatomy, University of Göttingen, Kreuzbergring 36, D‐3400 Göttingen, FRG
2. German Primate Center, Göttingen, FRG; Monell Chemical Senses Center, Philadelphia, USA
3. German Primate Center, Göttingen, FRG
4. Institute of Anatomy, University of Göttingen; German Primate Center, Göttingen, FRG