""A Monograph on the Sub-Class Cirripedia: With Figures of All the Species"" is a scientific book written by Charles Darwin and published in 1854. The book is a comprehensive study of the sub-class Cirripedia, which includes barnacles and other similar crustaceans. Darwin provides detailed descriptions of the anatomy, behavior, and classification of all known species of Cirripedia, accompanied by numerous illustrations and diagrams. The book is considered a landmark in the study of marine biology and is still widely referenced by scientists today. Darwin's observations and insights into the evolution of these creatures also foreshadowed many of his later ideas about natural selection and the origin of species. Overall, ""A Monograph on the Sub-Class Cirripedia"" is a seminal work in the field of marine biology and a testament to Darwin's scientific acumen and attention to detail.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.