[ iv ] 
VIII. On the Fossil Mammals of Australia . — Part X. Family Macropodid^e : Man- 
dibular Dentition and Parts of the Skeleton of Palorchestes ; additional evidences 
of Macropus Titan, Sthenurus, and Procoptodon. By Professor Owen, C.B., 
F.B.S., &c page 197 
IX. On Multiple Contact of Surfaces. By William Spottiswoode, M.A., 
Treas.B.S. 227 
X. On the Development of the Teeth of Fishes (Elasmobranchii and Teleostei). By 
Charles S. Tomes, M.A. Communicated hy John Tomes, F.B.S. . . . 257 
XI. The Croonian Lecture . — Preliminary Observations on the Locomotor System of 
Medusas. By George J. Bomanes, M.A., F.L.S., &c. Communicated by Professor 
Huxley, LL.D ., Sec. B.S., &c , . 269 
XII. On the Befraction of Sound by the Atmosphere. By Professor Osborne Beynolds. 
Communicated by Professor Stokes, Sec. B.S. 315 
PABT II. 
XIII. On Bepulsion resulting from Badiation . — Parts III. & IV. By William Crookes, 
F.B.S. &c 325 
XIV. On the Development and Succession of the Poison-fangs of Snakes. By Charles 
S. Tomes, M.A. Communicated by John Tomes, F.B.S. . . . . . . 377 
XV. On the Variations of the Daily Mean Horizontal Force of the Earth's Magnetism 
produced by the Suns Dotation and the Moon's Synodical and Tropical Devolutions. 
By J. A. Broun, F.B.S 387 
XVI. On the Expansion of Sea-water by Heat. By T. E. Thorpe, Ph.D., and A. W. 
Pucker, M.A. (. Fellow of Brasenose College , Oxford ), Professors of Chemistry and 
Physics in the Yorkshire College of Science. Communicated by W. B. Carpenter, 
M.D., LL.D., F.B.S 405 
XVII. The Bakerian Lecture . — On the Gaseous State of Matter. By Thomas Andrews, 
M.D., LL.D., F.B.S., Vice-President of Queen's College, Belfast . . . 421 
XVIII. The Minute Anatomy of the Alimentary Canal. By Herbert Watney, M.A. , 
M.D. , Demonstrator of Microscopical Anatomy at St. George's Hospital. Commu- 
nicated by Dr. Klein, F.B.S. 451 
XIX. The Besidual Charge of the Leyden Jar. By J. Hopkinson, M.A., D.Sc. Com- 
municated by Sir William Thomson, F.B.S., Professor of Natural Philosophy in 
the University of Glasgow 489 
