Problems of Platyrhine Taxonomy and Distribution. Molecules, Morphology and Platyrrhine Systematics; H. Schneider, A.L. Rosenberger. Primates of the Atlantic Forest: Origin, Distributions, Endemism and Communities; A. Rylands, et al. Evolutionary Perspectives on the Marmosets and Tamarins (Saguinus, Callithrix, Cebuella, Leontopithecus, Callimico). P.A Garber, A.L. Rosenberger. The Other Side of Callitrichid Gummivory: Digestibility and Nutritional Value; M.L. Power. Locomotion of Golden Lion Tamarins (Leontopithecus Rosalia): The Effects of Foraging Adaptations and Substrate Characteristics on Locomotor Behavior; B. Stafford, et al. Update on Cebine Evolution (Cebus, Saimiri). L. Fedigan, et al. Species Definition and Differentiation as Seen in the Postcranial Skeleton of Cebus; S. Ford, D.M. Hobbs. New Perspectives on the Pithecines (Pithecia, Cacajao, Chiropotes, Callicebus, Aotus). A.L. Rosenberger, M.A. Norconk. The Evolution of Positional Behavior in the Saki-Uakaris (Pithecia, Chiropotes, and Cacajao); S.E. Walker. Rethinking Ateline Evolution (Alouatta, Ateles, Brachyteles, Lagothrix). W.C. Hartwig, et al. Dental Microwear and Diet in a Wild Population of Mantled Howling Monkeys (Alouatta palliata); M. Teaford, K. Glander. 21 Additional Articles. Index.