Ruppert/Barnes' Best-Selling Introduction to the Biology of Invertebrates is Highly Regarded for Its Accuracy and Strong Research Base. This Thorough Revision Provides a Survey by Animal Group, Emphasizing Evolutionary Origins, Adaptive Morphology and Physiology, While Covering Anatomical Ground Plans and Basic Developmental Patterns. New Co-Author Richard Fox Brings to the Revision His Expertise As an Ecologist, Offering a Good Balance to Ruppert's Background As a Functional Morphologist. Lavish Illustrations and Extensive Citations Make the Book Extremely Valuable As a Teaching Tool and Reference Source.