DARWIN ON VESTIGES. “Along with paleontological evidence from the fossil record and biogeographic evidence from species distributions, Darwin turned, naturally, to comparative anatomy, citing such well-known topics as homologous and analogous (convergent) features and similarities in skeletons and patterns of embryonic development. Darwin cited another prominent finding of comparative anatomy as an obvious line of evidence for evolution: vestigial features.”
http://evolution-outreach.springeropen.com/articles/10.1186/s12052-014-0012-5