TO 



PROFESSOR H. MILNE EDWARDS, 



DEAN 01' THE FACULTY OF SCIENCES OF PARIS; PROFESSOR AT THE MUSEUM OF NATURAL HISTORY ; 



MEMBER OF THE INSTITUTE OF FRANCE; 



FOREIGN MEMBER OF THE ROYAL SOCIETY OF LONDON, OF THE ACADEMIES OF BERLIN, STOCKHOLM, 



ST. PETERSBURG, VIENNA, KONIGSBERG, MOSCOW, BRUSSELS, HAARLEM, BOSTON, 



PHILADELPHIA, ETC. 



THIS WORK IS DEDICATED, 



WITH THE MOST SINCERE RESPECT, 



AS THE ONLY, THOUGH VERY INADEQUATE ACKNOWLEDGMENT 



WHICH THE AUTHOR CAN MAKE OF HIS GREAT AND 



CONTINUED OBLIGATIONS TO THE 



' HISTOIRE NATURELLE DES CRUSTACES,' 



AND TO 

 THE OTHER MEMOIRS AND WORKS ON NATURAL HISTORY PUBLISHED BY 



THIS ILLUSTRIOUS NATURALIST. 



