Includes bibliographical references

Cranial anatomy of the ostracoderms in relation to the organisation of larval lampreys, by H. P. Whiting.--The composition of vertebrae and the occipital region of the skull, by C. C. D. Shute.--The shoulder gi rdle of Eogyrinus, by S. M. Andrews. On a Queensland labyrinthodont, by A. A. Howie.--The interrelationships of the earliest tetrapods, by A. L. Panchen.--The proterosuchian thecodonts, by A. R. I. Cruickshank.--T he evolution of the archosaur pelvis and hind-limb, by A. J. Charig.--C omments on the evolution and affinities of snakes, by A. d'A. Bellairs. --The pectoral region and habits of a new digging dicynodont, by C. B. Cox.--On the skull of Regisaurus jacobi, by Ch. H. Mendrez.--The jaw ar ticulation and musculature of the Whaitsiid Therocephalia, by T. S. Kem p.--The evolution of the jaw articulation of cynodonts, by A. W. Crompt on.--The problem of insectivore classification, by P. M. Butler.--The f ossil species in space and time, by K. A. Joysey.--Progress in biologic al evolution, by W. G. Kèuhne.--Publications of F. R. Parrington, (p. [ viii]).