On Permian and Triassic Tetrapods

Abstract

During the past few months some papers on early amphibia and reptiles have reached me from America, Russia, and China. These have afforded me much pleasure as a change from my present unaccustomed work, and I therefore feel that I can usefully express my thanks to their authors by writing a criticai summary of their conclusions. And such a review is justified because collectively these papers add very greatly to our knowledge and understanding of the evolution of early Tetrapods. Reference will be made to a list of these papers at the end of this review. It is most convenient and logical to discuss firstly the individual animais and then their distribution in time.