TO 



THE EAEL OF DEBBY, 



PRESIDENT OP THE ZOOLOGICAL SOCIETY OF LONDON, 

 ETC., ETC., ETC., 



WHOSE DISTINGUISHED AID TO ZOOLOGY 

 HAS BEEN SO LIBERAL, CONTINUOUS, AND EFFICIENT, 



THE PRESENT VOLUME 



IS, BY PERMISSION, DEDICATED, 

 BY HIS LORDSHIP'S RESPECTFUL AND OBLIGED SERVANT, 



THE AUTHOR. 



