Vol. 38, No. 2 April 1997

Huffman, Michael A.;Gotoh, Shunji; Turner, Linda A.;Hamai, Miya;Yoshida, Kozo: Seasonal Trends in Intestinal Nematode Infection and Medical Plant Use Among Chimpanzees in the Mahale Mountains, Tanzania..........111 Key Words: Chimpanzee, Seasonal variation, Oesophagostomum stephanostomum, Antiparasite behavior, Sampling bias.

Maestripieri, Dario; Wallen, Kim: Affiliative and Submissive Communication in Rhesus Macaques..........127 Key Words: Facial expression, Gestures, Submission, Affiliation, Rhesus macaque.

Timmermans, Paul J. A.; Vochteloo, Johan D.; Vossen, Jo M. H.: Mobility of Surrogate Mothers and Presistent Neophobia in Cynomolgus Monkeys ( Macaca fascicularis )..........139 Key Words: Long-tailed macaque, Mobile surrogates, Development, Neophobia, Exploration.

Gygax, Lorenz; Harley, Nerida; Kummer, Hans: A Matrilineal Overthrow with Destructive Aggression in Macaca fascicularis ..........149 Key Words: Long-tailed macaque, Matrilineal overthrow, Aggression.

Mahaney, William C.; Milner, Michael W.; Sanmugadas, Kandiah; Hancock, R. G. V.; Aufreiter, Susan; Wrangham, Richard; Pier, Harold W.: Analysis of Geophagy Soils in Kibale Forest, Uganda..........159 Key Words: Geophagy, Zoo pharmacognosy, Chemical and mineral ecology, Chimpanzee.

Short Communications

Norconk, Marilyn A.; Wertis, Catherine; Kinzey, Warren G.: Seed Predation by Monkeys and Macaws in Eastern Venezuela: Preliminary Findings..........177 Key Words: Neotropics, Bearded saki monkey, Red and green macaw, Puncture resistance, Mechanical seed protection, Dietary toxins.

Ikura, Sayuri; Terao, Keiji; Takenaka, Osamu; Noguchi, Atsuo; Murayama, Yuichi: Distribution of U5 Antigen on Lymphocyte Subsets in Human and Nonhuman Primates..........185 Key Words: U5 antigen, B cells, NK cells, Old World monkey, Ape.

Review

Uehara, Shigeo: Predation on Mammals by the Chimpanzee ( Pan troglodytes )..........193 Key Words: Chimpanzee, Prey selectivity, Predation frequency, Mammalian prey, Forest monkey, Colobine monkey, Bonobo.

Researach Reports

Corrêa, Honorly Katia M.; Coutinho, Paulo E. G.: Fatal Attack of a Pit Viper, Bothrops jararaca ,on an Infant Buffy-tufted Ear Marmoset ( Callithrix aurita )..........215 Key Words: White-eared marmoset, Mobbing, Bothrops jararaca , Predation.