Vol. 40, No. 3 July 1999

Tomonaga, Masaki: Inversion Effect in Perception of Human Faces in a Chimpanzee ( Pan troglodytes )..........417 Key Words: Face perception; Inversion effect; Matching task; Chimpanzee (Pan troglodytes ); Hemisperic specialization.

Hamada, Yuzuru; Hayakawa, Seiji; Suzuki, Juri; Ohkura, Satoshi: Adolescent Growth and Development in Japanese Macaques ( Macaca fuscata ): Punctuated Adolescent Growth Spurt by Season..........439 Key Words: Adolescence; Adolescent growth spurt; Japanese macaques; Macaca fuscata ; Adaptive growth pattern.

Soltis, Joseph: Measuring Male-female Relationships During the Mating Season in Wild Japanese Macaques ( Macaca fuscata yakui )..........453 Key Words: Sexual selection; Mate choice; Relationships; Macaca fuscata .

Anderson, Matthew J.; Nocturnal Primate Research Group: The Use of Hand Morphology in the Taxonomy of Galagos..........469 Key Words: Prosimian; Bushbaby; Taxonomy; Morphology; Hand pads.

Ahlborn, Silke; Rothe, Hartmut: Food Selection of Semifree Common Marmosets ( Callithrix jacchus ): Indications for Optimal Foraging..........479 Key Words: Callithrix jacchus ; Semi-free enclosure; Experimental study; Food selection; Optimal foraging.

Nakamichi, Masayuki: Spontaneous Use of Sticks as Tools by Captive Gorillas ( Gorilla gorilla gorilla )..........487 Key Words: Gorilla gorilla gorilla ; Spontaneous tool use; Stick-throwing; Branch-pulling; Branch-beating; social relationships.

Fowler, L. A.; Hopkins, W. D.; Albers, H. E.;Morris, R. D.; Hyatt, C. W.: Establishing the Presence of a Body Temperature Rhythm in Chimpanzees ( Pan troglodytes ) Using a Tympanic Membrane Thermometer..........499 Key Words: Body temparature rhythm; Circadian rhythm; Chimpanzee (Pan troglodytes ); Tympanic membrane.

Short Communication

McGrew, W. C.; Marchant, L. F.: Laterality of Hand Use Pays Off in Foraging Success for Wild Chimpanzees..........509 Key Words: Laterality; Handedness; Foraging; Tool use; Pan troglodytes .

Researach Reports

Call, Josep: The Effect of Inter-opponent Distance on the Occurrence of Reconciliation in Stumptail ( Macaca arctoides ) and Rhesus Macaques (Macaca mulatta )..........515 Key Words: Post-conflict behavior; Reconciliation; Inter-opponent distance; Macaques; Conciliatory tendency.

Domingo-Roura, Xavier; Yamagiwa, Juichi: Monthly and Diurnal Variations in Food Choice by Macaca fuscata yakui During the Major Fruiting Season at Yakushima Island, Japan..........525 Key Words: Macaca fuscata yakui : Diurnal variation; Protein; Food choice; Nutrition.

Book Reviews..........537