A Contribution To The Embryology And Phylogeny Of The Pycnogonids (1891)

Focusing on the embryology and evolutionary history of Pycnogonids, this scientific work by Thomas Hunt Morgan explores the development of sea spiders. It details the anatomy of their larvae and their evolutionary ties to other arthropods, including spiders and crustaceans. Morgan illustrates various developmental stages, emphasizing the formation of their distinctive long legs. He also proposes a theory regarding their origins from a primitive arthropod ancestor. This book is a significant contribution to marine biology and arthropod evolution.