Animal Parasites and Messmates

A scientific publication written in the late 19th century. This work primarily explores the relationships between various animal species, focusing on the concepts of parasitism and commensalism in the animal kingdom. The text likely dives into fascinating examples and intricate dynamics of how animals coexist, survive, and interact with one another in their respective ecosystems. At the start of this detailed study, the author introduces the concept of animal messmates, which refers to animals that share their living spaces with others, either as roommates or through mutualistic relationships. The opening emphasizes the importance of food adaptation in animals and introduces categories that define the spectrum of interactions, such as free messmates and fixed messmates. The text hints at numerous examples from various animal classes, demonstrating how these creatures live alongside each other, revealing the complexity of their cohabitation in nature, and sets the stage for a comprehensive examination of these relationships throughout the subsequent chapters.