Vol. 37, No. 4 October 1996

Kaufman, Ruben: The Nature and Frequency of Agonism in Free ranging and Semi-free-ranging Brown Lemur, Eulemur fulvus ..........335 Key Words: Brown lemur, Agonism, Subtle, Mild, Rates.

Makori, Norbert; Rodriguez, Cruz G.; Cukierski, Mark A.; Hendrickx, Andrew G: Development of the Brain in Staged Embryos of the Long-tailed Monkey (Macaca fascicularis )...........351 Key Words: Morphogenesis, Central nervous system, Long-tailed macaque.

Hunt, Kevin D.; Cant, John G. H.; Gebo, Daniel L;, Rose, Michael D.; Walker, Suzanne E.; Youlatos, Dionisios: Standerdized Descriptions of Primate Locomotor and Postural Modes..........363 Key Words: Locomotion, Posture, Positional mode.

Iwamoto, Toshitaka; Mori, Akio; Kawai, Masao; Bekele, Afework: Anti-predator Behavior of Gelada Baboons..........389 Key Words: Gelada baboon, Anti-predator behavior, Predation, Mobbing.

Aimi, Mitsuru; Bakar, Amsir: Distribution and Deployment of Presbytis melalophos Group in Sumatera, Indonesia..........399 Key Words: Black-crested leaf monkey, White-thighed leaf monkey, Thomas' leaf monkey, Distribution, Sumatera, Metachromism, Neonate pelage coloration.

Neel, Mary-Ann: Mirrors, Monkeys, and Group Dynamics..........411 Key Words: Group dynamics, Affiliation, Aggression, Japanese macaque.

Takeshita, Hideko; Walraven, Vera: A Comparative Study of the Variety and Complexity of Object Manipulation in Captive Chimpanzees (Pan troglodytes ) and Bonobos (Pan paniscus )..........423 Key Words: Object manipulation, Tool use, Chimpanzee, Bonobo.

Short Communications

Galloway, Alison; Morbeck, Mary Ellen; Zihlman, Adrienne L.: Sex Differences in the Vertebral Column of Gombe Chimpanzees..........443 Key Words: Skeletal biology, Gombe chimpanzee, Vertebrae.

Laska, Matthias: A Study of Correlates of Hand Preferences in Squirrel Monkeys (Saimiri sciureus )..........457 Key Words: Common squirrel monkey, Hand preferences, Reaching tasks.

Book Reviews..........467

Information..........471