SMITHSONIAN MISCELLANEOUS COLLECTIONS 



PART OF VOL. XLVI 



RESEARCHES IN 

 HELMINTHOLOGY and PARASITOLOGY 



BY 



JOSEPH LEIDY, M. D., LL. D. 



PROFESSOR OF HUMAN AND COMPARATIVE ANATOMY AND ZOOLOGY 

 IN THE UNIVERSITY OF PENNSYLVANIA, PRESIDENT OF THE 

 ACADEMY OF NATURAL SCIENCES, AND OF THE FAC- 

 ULTY OF THE WAGNER FREE INSTITUTE OF 

 SCIENCE, PHILADELPHIA 



WITH A BIBLIOGRAPHY OF HIS CONTRIBUTIONS TO SCIENCE 

 Arranged and Edited 



BY 



JOSEPH LEIDY, JR., M. D. 



FELLOW OF THE COLLEGE OF PHYSICIANS AND MEMBER OF THE 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA ; OFFICIER 



L' INSTRUCTION PUBLIOUE, FRANCE 



(No. 1477) 



CITY OF WASHINGTON : 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1904 



