CONTENTS. 



PAGE 



W. Bateson. On the Morphology of the Enteropneusta. Plates 



I.— XII. Parts I. and II 1 



W. Bateson. On the Ancestry of the Chordata .... 67 



Walter Heape. The Development of the Mole {Talpa Europea). 



Stages E to J. Plates XIII, XIV, XV 105 



Sidney F. Harmer. On the Life History of Pedicellina. Plates 



XVI, XVII 147 



Arthur E. Shipley. On some points in the development of 



Petromyzon fluviatilis. Plates XVIII, XIX, XX, XXI. . .173 



The above are reprinted from the Quarterly Journal of Microscopical Science. 



