CONTENTS

• <NOTE>
  A Population Density Estimate of the Chimpanzee in the Haut-Niger National Park, Republic of Guinea.
  By Marie-Claire Fleury-Brugiere & David Brugiere
  
• <NOTE>
  Evidence of the Leaf-clipping Behavior by a Chimpanzee of an Unhabituated Group at Mahale.
  By Shigeo Uehara
  
• <NOTE>
  A Self-medicating Attempt to Remove the Sand Flea from a Toe by a Young Chimpanzee.
  By Toshisada Nishida
  
• <NOTE>
  Use of Leaf-sponge and Leaf-spoon by Juvenile Chimpanzees at Mahale.
  By Takahisa Matsusaka & Nobuyuki Kutsukake
  
• <NOTE>
  A Chimpanzee Trifling with a Squirrel: Pleasure Derived from Teasing?
  By Koichiro Zamma
  
• <NEWS>
  A Chimpanzee Attacks and Kills a Security Guard in Kigoma.
  By Hosea Y. Kayumboq_