CONTENTS. lU 



PAGE 



Life. By Robert James Graves, M.D., F.R.S. 

 Communicated by the Author, . . . 315 



Art. XV. On Eupyrchroite Phosphorite of Crown Point, New 

 York. By Charles T. Jackson, M.D., Assayer 

 to the State of Massachusetts, . . . 328 

 Description and Analysis, . . . . 330 



XVI. On the Aboriginal Tribes of India. By Major- 

 General John Briggs, F.B.S., Vice-President of 

 the Ethnological Society of London, . . 331 



XVII. Examples of Exuviation, or the Change of the Integu- 

 ments of Animals in the Crustacean Tribes. By 

 Sir John Graham Dalyell, Bart., author of the 

 Rare and Remarkable Animals of Scotland, 344 



XVIII. Comparison of the Modifications of the Osseous 

 Structure of the Megatherium with that in other 

 known existing and extinct species of the Class 

 Mammalia : Being an Abstract of a Memoir read 

 by Professor Owen to the Royal Society of 

 London, ...... 350 



Osseous Structure of the Megatherium, compared with 

 that in other known existing and extinct species 

 of Mammalia, ..... 350 



Hahits and Food of the Megatherium, . . 352 



Hypothesis of the Degeneration of the Ancient Mega- 

 therioides of South America into Modern Sloths, 

 erroneous, . . . . 35^ 



XIX. On the Slow Elevation and Subsidence of the Land in 



Switzerland. By Prof. B. Studer, . . 357 



XX. Microscopic Examination of Soundings, made by the 

 U. S. Coast Survey off the Atlantic Coast of the 

 United States. By Professor J. W. Bailey, 359 



XXI. Total Eclipse of the Sun, July 28, 1851. By J. W. 

 Good, Esq., Elsinore. Communicated by the 

 Author through Prof. Smyth, Astronomer Royal 

 for Scotland, . . . . ^ 3^ 



Observations at Kropp in Sweden, . . 3^0 



