vii 



Page 



True Teeth in the young Ornithorhynchus paradoxus. By Edward B. 

 Poulton, M.A., F.L.S., of Jesus and Keble Colleges, Oxford 353 



On the Belative Densities of Hydrogen and Oxygen. Preliminary 

 Notice. By Lord Rayleigh, Sec. R.S., Professor of Natural Philo- 

 sophy in the Royal Institution 356 



List of Presents 363 



February 16, 1888. 



Note on the Changes effected by Digestion on Fibrinogen and Fibrin. 

 By L. C. Wooldridge, M.D., D.Sc, Assistant Physician to Guy's 

 Hospital 367 



A new Method for determining the Number of Micro-organisms in Air. 

 By Professor Carnelley, D.Sc, and Thos. Wilson, University College, 

 Dundee 368 



Note on the Number of Micro-organisms in Moorland Air. By Pro- 

 fessor Carnelley, D.Sc, and Thos. Wilson, University College, Dundee 369 



\ On the possibly Dual Origin of the Mammalia. By St. George Mivart, 



F.R.S 1 372 



List of Presents 379 



February 23, 1888. 



On the Relation between the Structure, Function, and Distribution of 

 the Cranial Nerves. Preliminary Communication. By W. H. Gaskell, 

 M.D., F.R.S 382 



Preliminary Note on the Development of the Skeleton of the Apteryx. 

 By T. J. Parker, B.Sc, Professor of Biologv in the University of 

 Otago 391 



v On Remnants or Vestiges of Amphibian and Reptilian Structures found 

 in the Skull of Birds, both Carinatse and Ratitse. Bv W. K. Parker, 

 F.R.S 397 



List of Presents 402 



No. 964.— March 1, 1888. 



List of Candidates 405 



On the Changes produced by Magnetisation in the Dimensions of Rings 

 and Rods of Iron and of some other metals. By Shelford Bidwell, 

 M.A., F.R.S. 406 



On Electrical Excitation of the Occipital Lobe and adjacent Parts of the 

 Monkey's Brain. By E. A. Schafer, F.R.S., Jodrell Professor of 

 Physiology in University College, London 408 



A Comparison of the Latency Periods of the Ocular Muscles on Excita- 

 tion of the Frontal and Occipitotemporal Regions of the Brain. By 

 E. A. Schafer, F.R.S., Jodrell Professor of Physiology in University 

 College, London * u 411 



List of Presents 412 



