ai 



Du|-(o THE INTERNATIONAL SCIENTIFIC SERIES. 



ANIMAL PARASITES AND MESSMATES. 



BY 



P. J. VAN BENEDEN, 



PEOFESSOE AT THE tJNIVEESITY OF LOtTVAlN, COKEKSP0ND£ST OF TEtE INSTITUTE OP 



FEANCE. 



WIIH EIGETY-TEREE ILLUSTRATIONS. 



NEW YORK: 



D. APPLETON AND COMPANY, 



549 & 551 BKOADWAY. 



1876. 



