Proceedings of a symposium held at the University of Pennsylvania Museum in January 1987. The primary objective of this symposium was to examine the diversity in data, methodologies, and interpretive models that have emerged from recent fieldwork. The volume is divided into three main parts: the first contains articles devoted to the excavation and interpretation of individual sites, the second focuses on papers dealing with issues concerning the Middle Paleolithic, and the third deals with aspects of variability in the Upper Paleolithic. An extensive bibliography is included.