1. Department of Biology; Birmingham-Southern College; Birmingham Alabama 35254
2. Plio-Pleistocene Palaeontology Section, Department of Vertebrates Ditsong National Museum of Natural History (Transvaal Museum); Pretoria 0002 South Africa
3. Institute for Human Evolution,University of the Witwatersrand; Private Bag 3 WITS 2050 Johannesburg South Africa
4. Department of Anthropology; University of Wisconsin-Madison; 1180 Observatory Drive, 5240 Social Science Building Madison Wisconsin 53706