I. On the evolution of the vertebral column of amphibia and amuivta

Abstract

This paper, with that by Miss Abbott and myself (‘Phil. Trans.,’ B, 1895), forms a rounded-off investigation of the evolution of the vertebral column. I have to thank Miss Abbott for the preparation of sections and for hundreds of preliminary consecutive drawings of Salamandra maculosa, Triton critatus , and of Hyla septentrionalis . Mr. H . H. Brindley most generously placed a t my disposal an enormous number of sections through the tails of embryos and adults of Hoplodactylus pacificus, Platydactylus gleadovi , and of Lacerta vivipara , which he had already prepared for some other occasion.