CONTENTS. 



PAGE 



^S. F. Harmer. On the occiu-rence of Embryonic Fission in Cyclo- 



stomatous Polyzoa. Plates I. — III 1 



^S. J. HicKSON. The Early Stages in the Development of Disticho- 

 pora violacea, with a Short Essay on the Fragmentation of the 

 Nucleus. Plate IV 45 



3 A. Sedgwick. On the Law of Development commonly known as 

 von Baer's Law ; and on the Significance of Ancestral Rudiments 

 in Embryonic Development 75 



*A. Sedgwick. On the Inadequacy of the Cell Theory, and on the 

 Early Development of Nerves, particularly of the Third Nerve 

 and of the Sympathetic in Elasmobranchii 93 



^ J. J. Lister. Contributions to the Life-History of the Foramiuifera. 



Plates v.— VIII 108 



8J. Graham Kerr. On some points in the anatomy of Nautilus 



Pompihus. Plates IX. and X 181 



' A. Sedgwick. Further Remarks on the Cell Theory, with a Reply 



to Mr Bourne 213 



'E. W. MacBride. The Development of Asterina Gibbosa. Plates 



XL— XXII 221 



1 Bepi-inted from the Quarterly Journal of Microscopical Science, Vol. 34. 



2 Ibid. Vol. 35. 

 » Ihid. Vol. 36. 

 ^ Ihid. Vol. 37. 



■'' From the Philosophical Transactions of tJie Royal Society, Vol. 186, 1895. 

 " From the Proceedings of tlie Zoological Society of London, 1896. 

 ' From the Quarterly Journal of Microscopical Science, Vol. 38. 



