CONTENTS. 



XIII. Continuation of the Paper on the Relations between the Nerves of Motion and 

 of Sensation, and the Brain ; more particularly on the Structure of the Medulla 

 oblongata and the Spinal Marrow. By Sir Charles Bell, F.R.S. ^c. page 255 



XIV. Experimental Researches in Electricity. — Tenth Series. By Michael Faraday, 



D.C.L. F.R.S. Fullerian Prof. Chem. Royal Institution, Cmr. Memh. Royal 

 and Imp. Acadd. of Sciences, Paris, Petersburgh, Florence, Copenhagen, 

 Berlin, 8^c. ^c 263 



XV. Discussion of Tide Observations made at Liverpool. By John William Lubbock, 



Esq. V.P. and Treas. R.S. 275 



XVI. Remarks on the difficulty of distinguishing certain Genera of Testaceous 

 MoUusca by their Shells alone, and on the Anomalies in regard to Habitation 

 observed in certain Species. By John Edward Gray, Esq. F.R.S. 8^c. . 301 



XVII. On the supposed existence of Metamorphoses in the Crustacea. By J. O. West- 

 wood, F.L.S. 8^ Sec. Ent. Soc. Communicated by J. G. Children, Esq. 

 Sec. R.S. 311 



XVIII. On the Ice formed, under peculiar circumstances, at the bottom of running 

 Water. By the Rev. James Farqvharson, of Alf or d, F.R.S. .... 329 



XIX. Observations on the Theory of Respiration. By William Stevens, M.D. D.C.L. 

 Fellow of the Royal College of Physicians in Copenhagen, Fellow of the Royal 

 College of Surgeons in London, 8^c. ^c. Communicated by W. T. Brande, Esq. 

 V.P.R.S. 345 



XX. Discovery of the Metamorphosis in the second type of the Cirripedes, viz. the 



Lepades, completing the Natural History of these singular Animals, and con- 

 firming their affinity with the Crustacea. By J. V. Thompson, F.L.S. Deputy 

 Inspector-General of Hospitals. Communicated by Sir James Macgrigor, Bart. 

 M.D.F.R.S. , 355 



