[ Vi ] 
IX. On the Embryogeny of Antedon rosaceus, Linck (Comatula rosacea of Lamarck). 
By Professor Wyville Thomson, LL.D., F.B.S. E., M.B.I.A., F.G.S., &c. Com- 
municated by Thomas Henry Huxley, F.B.S page 513 
X. On the Sextactic Points of a Plane Curve. By A. Cayley, F.B.S 545 
XI. A Description of some Fossil Plants , showing Structure , found in the Lower Coal- 
seams of Lancashire and Yorkshire. By E. W. Binney, F.B.S. . . . . 579 
XII. The Bakerian Lecture. — On a Method of Meteorological Registration of the 
Chemical Action of Total Daylight. By Henry Enfield Roscoe, B.A., F.B.S., 
Professor of Chemistry in Owens College , Manchester 605 
XIII. On the Commissures of the Cerebral Hemispheres of the Marsupialia and Mono- 
tremata as compared with those of the Placental Mammals. By William Henry 
Flower, F.B.S., F.B.C.S. , Conservator of the Museum of the Royal College of 
Surgeons of England 633 
XIV. On the Sextactic Points of a Plane Curve. By William Spottiswoode, M.A., 
F.B.S., &c 653 
XV. On the Marsupial Pouches, Mammary Glands, and Mammary Foetus of the Echidna 
Hystrix. By Professor Owen, F.B.S., &c 671 
XVI. On the Influence of Physical and Chemical Agents upon Blood ; with special refer- 
ence to the mutual action of the Blood and the Respiratory Gases. By George 
Harley, M.D., Fellow of the Royal College of Physicians, Professor of Medical 
Jurisprudence in University College, London. Communicated by Professor 
Sharpey, M.D., Sec. B.S. 687 
XVII. On a New Geometry of Space. By J. Plucker, of Bonn, For.Memb. B.S. 725 
Index 793 
Presents 
Appendix. 
[ i ] 
