This work investigates the classification and characteristics of Palaeozoic corals and coral-like organisms. Chapman's research focuses on the fossil record of these ancient marine invertebrates, drawing upon geological strata from the Palaeozoic era. The book aims to provide a systematic overview of the diverse forms and evolutionary lineages of corals during this period, contributing to the understanding of early marine ecosystems.

This specialized text is likely regarded as a foundational contribution to the study of Palaeozoic paleontology and marine geology. Its detailed classification and analysis of fossil corals would appeal to researchers and advanced students in the field. The work's focus on specific fossil types and geological strata suggests a rigorous, data-driven approach to understanding ancient life.