The book "Muscles of the Propulsion Locks of the Jaws in Some Primitive Reptiles" by the author Richard K. Fox is a study of the anatomy and functions of the muscles of the jaws in some representatives of primitive reptiles. In this work, the author analyzes in detail the structure and evolutionary development of the driving muscles of the jaws in various groups of reptiles, draws conclusions about their role in the mechanisms of chewing and general functional adaptation of organisms. The book is addressed to specialists in the field of zoology, comparative anatomy and evolutionary biology, as well as to all those interested in the study of the structure and functions of the muscles of the animal world.