CONTENTS OF No. 265.— New Series. 



Volume 67. Part I. 



MEMOIRS : page 



Some Observations upon the Development of the Teeth ofPhyseter 

 macrocephalus. By Frank E. Beddard, D.Sc, M.A., F.R.S. 

 (With 13 Text-figures) 1 



The ' Segmentation Cavity ' of the Egg of the Frog. By Alexander 

 Meek. (With Plate 1 and 1 Text-figure) 33 



Nuclear Divisions in A moeba prot eus. By Monica Taylor, 

 S.N.D. (With Plate 2) 39 



On Amphilina pa rag o n o po ra, sp. n., and a hitherto unde- 

 scribed Phase in the Life-history of the Genus. By W. N. F. 

 Woodland, D.Sc. (London). (With Plates 3-5) .... 47 



On the Strobilization of Aurelia. By E. Percival, B.Sc, Department 

 of Zoology, The University, Leeds. (With Plate 6 and 3 Text- 

 figures) 85 



Histology of the Soft Parts of Astraeid Corals. By G. Matthai, M.A. 

 (With Plates 7 and 8) .101 



The Yolk-Sac and Allantoic Placenta in Perameles. By T. Thomson 

 Flynn, D.Sc, Ralston Professor of Biology, University of Tasmania. 

 (With Plates 9-11 and 4 Text-figures) 123 



Mr. Milford, Oxford University Press, Amen Corner, London, E.C. 4, will be glad to 

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