A Junior Course of Practical Zoology is a comprehensive guidebook for students who want to learn about the practical aspects of zoology. Authored by A. Milnes Marshall, the book covers a wide range of topics related to the animal kingdom. It begins with an introduction to the basic principles of zoology and then delves into the study of different animal groups, such as protozoa, sponges, coelenterates, annelids, mollusks, arthropods, fishes, amphibians,...