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Preliminary Note on the Fossil Remains of a Chelonian Eeptile, Cerato- 

 chelys sthenurus, from Lord Howe's Island, Australia. By Thomas 

 H. Huxley, F.RS 232 



Action of Caffein and Theine upon Voluntary Muscle. By T. Lauder 

 Brunton, M.D., F.RS., and J. Theodore Cash, M.D 238 



Contributions to our Knowledge of the Connexion between Chemical 

 Constitution and Physiological Action. Preliminary Communication 

 on the Action of certain Aromatic Bodies. Bv T. Lauder Brunton, 

 M.D., F.RS., and J. Theodore Cash, M.D * , 240 



List of Presents 240 



On the Effect of Polish on the Reflexion of Light from the Surface of 

 Iceland Spar. By C. Spurge, B.A., St. Catherine's College, Cambridge 242 



No. 254. 



Further Experiments on the Distribution of Micro-Organisms in Air (by 

 Hesse's method). By Percy F. Frankland, Ph.D., B.Sc, F.C.S., and 

 T. G. Hart, A.RS.M. (Plate 3) 267 



April 21, 1887. 



On Phosphonium Chloride. By Sidney Skinner, B.A., Scholar of Christ's 

 College, Cambridge 283 



On the Principal Electric Time-constant of a Circular Disk. By Horace 

 Lamb, M.A, F.RS., Professor of Pure Mathematics in the Owens 

 College, Victoria University 289 



On Parts of the Skeleton of Meiolania platyceps (Ow.). By Sir Richard 

 Owen, K.C.B., F.RS., &c. 297 



Some Applications of Dynamical Principles to Physical Phenomena. 

 Part II. By J. J. Thomson, M.A., F.RS., Fellow of Trinity College 

 and Cavendish Professor of Experimental Physics in the University of 

 Cambridge 297 



Conduction of Heat in Liquids. By C. Chree, B.A., King's College, 

 Cambridge 300 



List of Presents 302 



April 28, 1887. 



Note on Dr. G. J. Hinde's Paper " On Beds of Sponge-remains in the 

 Lower and Upper Greensand of the South of England " (' Philosophical 

 Transactions, 5 1885, p. 403). By Edward Hull, LL.D., F.RS., &c, 

 Director of the Geological Survey of Ireland 304 



Note on Professor Hull's Paper. By Edward T. Hardman, of the 

 Geological Survey of Ireland 308 



On the Homologies and Succession of the Teeth in the Dasyuridse, with 

 an Attempt to trace the History of the Evolution of Mammalian Teeth 

 in general. By Oldfield Thomas, British Museum (Natural History).... 310 



