"Two New Pelycosaurus from the Lower Permian Sediments of the Oklahoma Basin" is a book by Richard C. Fox. In this research paper, the author offers the reader a detailed study of two new species of pelycosaurs found in Lower Permian sediments in the state of Oklahoma. The book contains descriptions of fossils, reconstructions of the appearance of animals, their classification and comparison with other known species. This is a valuable addition to the paleontological literature, helping to better understand the evolutionary development of pelycosaurs and their place in Earth's history.