were originally described from the United States and some of the 
records of rare parasites are from this country. 
Undoubtedly there are other undescribed parasites and unrecorded 
occurrences of rare parasites which would be brought to light if more 
veterinarians took an active interest in the subject of parasitology. 
It should be an especially interesting field to the young man who 
still has energy to expend on postmortem examinations and who has 
not yet grown rusty in regard to what he learned of parasitology in 
college. 
11 
