U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ANIMAL INDUSTRY Bulletin No. 79. 

 D. E. SALMON, D. V. M., Chief of Bureau. 



THE DETERMINATION OF GENERIC TYPES. 



LIST OF ROUNDWORM GENERA. WITH THEIR 

 AND TYPE SPECIES. 



CH. WARDELL STILES, Ph. D., 



Zoologist, U. S. Public Health and Marine- Hospital Service; Consulting 

 Zoologist, Bureau of Animal Industry, 



AND 



ALBERT HASSALL, M. R. C. V. S., 

 Assistant in Zoology, Bureau of Animal Industry. 



WASHINGTON : 



GOVERNMENT PRINTING OFFICE. 

 1905. 



