ii CONTENTS. 



PAGE 



VI. On the Theory of Parallel Lines. By Henry Meikle, 



Esq. Communicated by the Author, . . 255 



VII. Bemarks on some Corals obtained from great depths 

 in the Antarctic Ocean, in a Letter from Charles 

 Stokes, Esq., F.R.S., F.G.S., &c., to Captain 

 Sir James C. Ross, R.N., . . . .258 



VIII. Hybridity in Animals and Plants, considered in refer- 

 ence to the question of the Unity of the Human 

 Species. By Samuel George Morton, M.D., 

 Author of " Crania Americana," " Crania iEgyp- 

 tiaca," &c. : — 



Part I. Mammalia. — Introductory Remarks, . . 262 



Part II. Birds, 276 



Part III. Reptiles, Fishes, MoUusca, and Insects, . 282 



Part IV. Plants, 284 



Remarks, ....... 286 



Conclusions, . . . . . . -288 



IX. Agricultural Discourse. By John Davy, M.D. , F.R.S., 



Inspector-General of Army Hospitals, Honorary 

 Member of the General Agricultural Society of 

 Barbadoes. Read at their Third Half- Yearly 

 Meeting in 1847, . . . . . 288 



X. On the Foundation of a New Geology. By Professor 



G. BiscHOF of Bonn, 3Q4 



.XI. On the Relations of Ethnology to other Branches of 

 Knowledge. By J. C. Prichard, M.D., F.R.S., 

 Corresponding Member of the Institute of France, 

 &c. &c., &c. Communicated by the Ethnological 

 Society, 307 



XII. On the Motion of Glaciers. By M. Ch. Martins, in 

 a Letter to Professor Jameson, Editor of the 

 Edinburgh New Philosophical Journal, . 336 



