Via Oswalt's system of classification, I compare the tool-kits of wild
and captive capuchins with those of Tanzanian chimpanzees and Tasmani
an aborigines. The results indicate that capuchins have tool-kits that
are smaller, and have lower ratios of artifacts to naturefacts, than
those of Tanzanian chimpanzees and Tasmanian aborigines. Accordingly,
Oswalt's system can be used productively to assess the relative techno
logical skills of monkeys versus those of apes and humans.