PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 78. No. B 524. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



CROONIAN LECTURE, 1906.— On Nerve Endings and on Special 

 Excitable Substances in Cells. By J. N. LANGLEY, F.R.S., Professor of 

 Physiology in the University of Cambridge 170 



The Experimental Analysis of the Growth of Cancer. By E. F. BASHFORD, 



M.D., J. A. MURRAY, M.B., B.Sc, and W. H. BOWEN, M.S., F.R.C.S. . 195 



Sex-determination in Hydatina, with some Remarks on Parthenogenesis. By 

 R. C. PUNNETT, Fellow of Gonville and Caius College and Balfour 

 Student in the University of Cambridge. (Plate 11)- • • • 22 3 



On the Julianiaceae, a New Natural Order of Plants. By W. BOTTING 

 HEMSLEY, F.R.S., F.L.S., Keeper of the Herbarium and Library, Royal 

 Botanic Gardens, Kew. (Abstract) 231 



Communication on Regeneration of Bone. By Sir WILLIAM MACEWEN, 



F.R.S. . . . ■ ' , 237 



printed FOR THE ROYAL SOCIETY AND sc^Sf« iln 

 HARRISON & SONS, 45, ST. MARTIN'S LANE, LONDON, W.C., 



SEP tf 1906 



No. B 524. 



Price Two Shillings and Sixpence. ^jOfffce \y 



September 3, 1906. 



