IZIL, 



SRLF 

 VRJ. 



niu 



TO 

 PROFESSOR ASA GRAY, M.D., LL.D., 



cohrebpondin'g member of the eoval bavarian academy, etc., 



WHOSE EMINENT LABORS 



HATE DONE SO MUCH TO ADVANCE AND RENDER POPULAR THAT DEPARTMENT 

 OF NATURAL HISTORY TO WHICH HIS LIFE HAS BEEN DEVOTED, 



THIS VOLUME 



IS, BY PEESnSSION, MOST RESPECTFULLY INSCRIBED 



AS A SLIGHT TRIBUTE OF 



PROFOUND ADMIRATION AND GRATITUDE. 



