CONTENTS. 



PAGE 



I. The Mosaic Theory of Development. E. B. WILSON. i 

 II. The Fertilization of tJic Ovum. E. G. CONKLIN . 15 



III. On Some Facts and Principles of Physiological 



Morphology. J. LOEB 37 



IV. Dynamics in Evolution. J. A. RYDER .... 63 

 V. On the Nature of Cell Organization. S. WATASE . 83 



VI. TJie Inadequacy of the Cell- Theory of Development. 



C. O. WHITMAN 105 



VII. Bdellostoma Dombeyi, Lac. HOWARD AYERS . . 125 



VIII. The Influence of External Conditions on Plant 



Life. W. P. WILSON 163 



IX. Irrito-Contractility in Plants. J. MUIRHEAD MAO 



FARLANE 185 



X. The Marine Biological Stations of Europe. BASH- 

 FORD DEAN 211 



APPENDIX The Work and the Aims of the Ma- 

 rine Biological Laboratory. C. O. WHITMAN. 235 



