Indian Tertiary and post Tertiary Vertebrata, Calcutta, Geological Survey Office, 1874-1902, India, paleontology, vertebrates, fossil, This illustration features a series of detailed diagrams showcasing various views of turtle carapaces from different angles. The images include top, side, and underside perspectives, providing a comprehensive study of the shapes and structures of the shells. Each illustration is meticulously labeled, likely denoting specific species or variations within a genus. The intricate linework emphasizes the distinctive patterns and textures of the turtle shells, highlighting their evolutionary adaptations. This educational representation serves as a valuable resource for understanding turtle anatomy and classification.