CONTENTS. 
CONTENTS OF No. 149, N.S., AUGUST, 1895. 
MEMOIRS : PAGE 
On the Variation of Haliclystus octoradiatus. By Epwaxp 
T. Browns, B.A., University College, London. (With Plate 1) iL 
The Collar-cells of Heteroccela. By Groren Bipper. (With 
Plate 2) . F ‘ ' : 9 
The Metamorghacts of Hetamodenas: By Henry Bory, M.A, 
F.L.S., late Fellow of Trinity College, Cambridge. ee 
Plates 3—9) ‘ 45 
A Criticism of the Cell- Tiaaey: ; Heine an cere to Mr. Scleminls 8 
Article on the Inadequacy of the Cellular Theory of Development. 
By Gitpert C. Bourne, M.A., F.L.S., Fellow of New College, 
Oxford . : : : : ‘ ‘ ce lod 
CONTENTS OF No. 150, N.S., NOVEMBER, 1895. 
MEMOIRS : 
On the Distribution of Assimilated Iron Compounds, other than 
Hemoglobin and Hematins, in Animal and Vegetable Cells. By 
A. B. Macatuvm, B.A., M.B., Ph.D., Associate-Professor of 
Physiology, University of Toronto. (With Plates 10—12) » 75 
On the Structural Changes in the Reproductive Cells during the 
Spermatogenesis of Elasmobranchs. (From the Huxley Re- 
search Laboratory, Royal College of Science, London.) By 
J. E. S. Moors, A.R.C.S. (With Plates 13—16) : . 275 
Notes on the Fecundation of the Egg of Spherechinus granu- 
laris, and on the Maturation and Fertilisation of the Egg of 
Phallusia mammillata. By M. D. Hitt, B.A.Oxon. (With 
Plate 17) 5 : : : - , . 315 
Further Remarks on the Cell-Theory, with a Reply to Mr. Bourne. 
By Apam Szpewicx, F.R.S.. 5 4 : . 331 
