[ vii ] 
XVIII. On the Changes which take place in the Deviations of the Standard Compass 
in the Iron Armour-plated, Iron, and Composite-built Ships of the Royal Navy, 
on a considerable change of Magnetic Latitude. By Staff Commander E. W. 
Creak, R.N., of the Admiralty Compass Department. Communicated by Sir 
Frederick J. O. Evans, K.C.B., Hydrographer of the Admiralty page 615 
XIX. Pelvic Characters of Tliylacoleo carnifex. By Professor Owen, C.B., F.R.S., 
&c .639 
XX. The Limiting Thickness of Liquid Films. By A. W. Reinold, M.A., Professor 
of Physics in the Royal Navcd College, Greenwich, and A. W. Rucker, M.A., 
Professor of Physics in the Yorkshire College, Leeds. Communicated by R. B. 
Clifton, M.A., F.R.S., Professor of Experimented Philosophy in the University 
of Oxford .645 
XXI. The Direct Influence of Gradual Variations of Temperature upon the Rate of 
Beat of the Dog's Heart. By H. Newell Martin, M.A., M.D., D.Sc.; Pro¬ 
fessor in the Johns Hopkins University , Baltimore, U.S.A. Communicated by 
Dr. M. Foster, Sec.R.S. .663 
Index to Part II .689 
PART III. 
XXII. On the Ciliated Groove ( Siphonoglyphe) in the Stomodceum of the Alcyonarians. 
By Sydney J. Hickson, B.A. (Cantab.), B.Sc. ( Lond.), Assistant in the 
Anatomical Laboratory, Oxford. Communicated by Professor H. N. Moseley, 
F.R.S. .693 
XXIII. On the Determination of the Number of Electrostatic Units in the Electro¬ 
magnetic Unit of Electricity. By J. J. Thomson, ALA., Fellow and Assistant 
Lecturer, Trinity College, Cambridge. Communicated by Lord Rayleigh, 
F.R.S. .70 7 
XXIV. The Development of Renilla. By Edmund B. Wilson, Ph.D., Fellow of 
Johns Hopkins University. Communicated by Professor Huxley, F.R.S. 723 
XXV. On the Continuity of the Protoplasm through the Walls of Vegetable Cells. By 
Walter Gardiner, B.A., late Scholar of Clare College, Cambridge. Com¬ 
municated by W. T. Thiselton Dyer, C.M.G., F.R.S. .817 
