TO 



SIR RODERICK IMPEY MURCHISON, 



D.C.L., LL.D., F.E.S., 



DIEECTOE OF THE GEOLOGICAL SUEVEY, 

 ETC., ETC., ETC., 



WHOSE PBE-EMINENCE IN SCIENCE HAS ALWAYS 



BEEN COUPLED WITH A GENEEOUS ENCOUEAGEMENT OF THE 



LABOUBS OF OTHEBS, 



WITH FEELINGS OF HIGH EEGAED AND ESTEEM 

 BY 



THE AUTHOE. 



