Lecture, three hours; discussion, one hour; field trips. Requisite: Life Sciences 7B. Recommended: course 100. Survey of history of life as illustrated in fossil record of California. Emphasis on how faunas have changed over time, especially during periods of diversification and extinction. Relation of influence of major events of geologic, climatic, and environmental change on living organisms to environmental change on human timescales. Emphasis on how scientists collect and evaluate fossil data through understanding of living organisms. Letter grading.