A Preliminary Study of the North 

 American Opossums of the Genus 

 Didelphis. 



By J. A. ALLEN. 



AUTHOR'S EDITION, extracted from BULLETIN 



OF THE 



;pXttseura of ^atxtral 



VOL. XIV, ARTICLE XI, pp. 149-188. 

 New York, June 75, 1901. 



