Vol. 40, No. 4 October 1999

Youlatos, Dionisios: Positional Behavior of Cebuella pygmaea in Yasuni National Park, Ecuador..........543
Key Words: Pygmy marmoset; Positional behavior; Scansorial; Vertical cling; Vertical leap; Callithricids; Ecuador.

Caton, J. M.; Hume, I. D.; Hill, D. M.; Harper, P.: Digesta Retention in the Gastro-intestinal Tract of the Orang Utan ( Pongo pygmaeus )..........551
Key Words: Orang utan; Digesta retention; Haustrated colon; Colon fermentation.

Daegling, David J.; Grine, Frederick E.: Terrestrial Foraging and Dental Microwear in Papio ursinus ..........559
Key Words: Chacma baboons; Diet; Feeding behavior; Scanning electron microscopy; Papionins.

Chu, Jui-Hua; Wu, Hai-Yin; Yang, Yi-Ju; Takenaka, Osamu; Lin, Yao-Sung: Polymorphic Microsatellite Loci and Low-invasive DNA Sampling in Macaca cyclopis ..........573
Key Words: Taiwan macaques; Microsatellite; Polymorphism; Low-invasive sampling; Paternity test.

Perwitasari-Farajallah, Dyah; Kawamoto, Yoshi; Suryobroto, Bambang: Variation in Blood Proteins and Mitochondrial DNA Within and Between Local Populations of Longtail Macaques, Macaca fascicularis on the Island of Java, Indonesia..........581
Key Words: Longtail macaques; Blood proteins; mtDNA; Genetic variation; Java island.

Hirai, Hirohisa; Umetsu, Kazuo: Preferable Mitogenicity of Beetle Lectin, Allo A, for the Blood Cell Culture of Macaques and Its Influence on Apoptosis..........597
Key Words: Japanese monkeys; Rhesus monkeys; Lectin; Macaques; Allo A; Mitogenicity; Apoptosis.

Short Communications

Jiang, Xuelong; Wang, Yingxiang; Wang, Qiang: Coexistence of Monogamy and Polygyny in Black-crested Gibbon ( Hylobates Concolor )..........607
Key Words: Black-crested gibbon; Monogamy; Polygyny; Coexistence.

Digby, Leslie J.: Targeting Aggression in Blue-eyed Black Lemurs ( Eulemur macaco flarifrons )..........613
Key Words: Targetting aggression; Lemurs; Eulemur macaco flavifrons ; Aggression; Reproductive competition.

Bermejo, Magdalena; Illera, German: Tool-set for Termite-fishing and Honey Extraction by Wild Chimpanzees in the Lossi Forest, Congo..........619
Key Words: Chimpanzee; Termites; Bees; Tool-set; Tool-use.

Book Review..........629

Note..........633

Cumulative Contents, Author Index, Scientific Name Index, and Subject Index for Volume 40 (1999)..........635