TO 



SIR RODERICK IMPEY MUROHISON, G.O.SS., 



F.R.S., MEM. IMP. ACAD. SCI. ST. PETERSBURGH, &C., &C. 



PRESIDENT AND TRUSTEE OF THE BRITISH ASSOCIATION FOR THE 

 ADVANCEMENT OF SCIENCE. 



DEAR SIR RODERICK, 



I avail myself with much pleasure of the permission 

 to dedicate this work to You, as President of the British 

 Association, because it owes its origin to a course of 

 enquiry suggested by the Geological Section, in which your 

 own labours have been so exemplary ; and, also, as an 

 acknowledgment of the kind interest you have manifested 

 in its progress. 



I am, yours most sincerely, 



RICHARD OWEN. 



February, 1 <54(J. 



