SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 140 



BIRD PARASITES OF THE NEMATODE 



SUBORDERS STRONGYLATA, 



ASCARIDATA, AND 



SPIRURATA 



ELOISE B. CRAM 



Of the Bureau of Animal Industry, United States Department of Agriculture 





UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON 



1927 



