Advances in Morphogenesis, Volume 9, provides an overview of the state of knowledge in morphogenesis. The book contains seven chapters and begins with a study of the interactions that occur in the morphogenesis of higher plants. This is followed by separate chapters on the regulatory mechanisms and cellular interactions in the development of annelids and mollusks; morphogenetic factors in limb ontogeny and limb regeneration; primary induction in birds; and the organogenesis and arrangement of cutaneous appendages in birds. Subsequent chapters deal with avian gastrulation and macromolecular syntheses and nucleocytoplasmic interactions in early development.