CONTENTS. 



PAGE 



^S. F. Harmer. On the occurrence 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 



'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 Foraminifera. 



Plates v.— VIII 108 



*J. Graham Kerb. 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. MacBeide. The Development of Asterina Gibbosa. Plates 



XI.— XXII 221 



1 Reprinted from the Quarterly Journal of Microscopical Science, Vol. 34. 



2 lUd. Vol. 35. 



3 lUd. Vol. 36. 

 " Ibid. Vol. 37. 



5 From the Philosophical Transactions o/ the Royal Society, Vol. 186, 1895. 



6 From the Proceedings of the Zoological Society of London, 1895. 



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



