[ iy ] 
XI. The Bakerian Lecture. — Researches on Gun-cotton. — Second Memoir. On the 
Stability of Gun-cotton. By F. A. Abel, F.B.S., V.P.C.S. . . . page 181 
XII. On the Orders and Genera of Ternary Quadratic Forms. By Henry J. Stephen 
Smith, M.A., F.R.S., Savilian Professor of Geometry in the University of 
Oxford 255 
XIII. On the Appendicular Skeleton of the Primates. By St. George Miyart, F.L.S., 
Lecturer on Comparative Anatomy at St. Mary's Hospital. Communicated by 
Professor Huxley, F.B.S. 299 
XIV. Observations on the Ovum of Osseous Fishes. By W. H. Ransom, M.J). Commu- 
nicated by Dr. Sharpe y, Sec. R.S .431 
XV. On the Lunar-diurnal Variation of the Magnetic Declination , with special regard 
to the Moon's Declination. By G. Neumayer. Communicated by the Pre- 
sident 503 
XVI. An Eighth Memoir on Quantics. By A. Cayley, F.B.S 513 
XVII. On the Chemical Intensity of Total Daylight at Kew and Para , 1865, 1866, and 
1867. By Henry E. Roscoe, F.B.S 555 
XVIII. The Croonian Lecture. — On the Influence exercised by the Movements of 
Respiration on the Circulation of the Blood. By J. Burdon Sanderson, M.D . , 
F.B.C.P. Communicated by Dr. Sharpey, Sec. R.S. 571 
XIX. Contribution to the Anatomy of Hatteria (Rhynchocephalus, Owen). By Albert 
Gunther, M.A., Ph.D., M.D. Communicated by Professor Owen, F.B.S. 595 
XX. On the Development and Succession of the Teeth in the Marsupialia. By William 
Henry Flower, F.B.S., F.B.C.S., &c ., Conservator of the Museum of the Royal 
College of Surgeons of England 631 
XXI. On the Genera Heterophyllia, Battersbyia, Palaeocyclus, and Asterosmilia ; the 
Anatomy of their Species, and their Position in the classification of the Sclerodermic 
Zoantharia. By P. Martin Duncan, F.G.S., Secretary to the Geological Society. 
Communicated by Professor Huxley, F.B.S 643 
XXII. Researches into the Chemical Constitution of Narcotine, and of its Products of 
Decomposition. — Part II. By A. Matthiessen, F.B.S., Lecturer on Chemistry in 
St. Mary's Hospital Medical School, and G. C. Foster, B.A., Professor of Physics 
in University College , L ion , 657 
Index 669 
Appendix. 
Presents ... ....[1] 
