TO 
MY KIND AND WORTHY FRIEND 
AVAL EE S-CES AH SAV EGN ¥, 
Member of the Egyptian Institute; Member of the Royal Legion of 
Honour; Member of the Academy of Marseilles, and 
Member of the Wernerian Society of Edinburgh, 
LES FIRS PART. OF THIS WORK, 
TO HIM WHO HAS DISCOVERED 
BY HIS MINUTE RESEARCH, IN THEIR ANATOMICAL 
STRUCTURES, MORE THAN 
ANY PRECEDING INVESTIGATOR, 
TS HUMBLY DEDICATED 
BY HIS SINCERE AND OBLIGED FRIEND, 
WILLIAM ELFORD LEACH, 1815. 
