When you know the entozoon you can dig him out and save the sheep's life.
2
An "entozoon" seems to the practical man a foolish, imaginary creature.
3
It is a semi-transparent entozoon; each segment is long compared to its breadth, and narrowed at both ends.
4
Then it was on the radiates, echinoderms, acalephes, polypes, entozoons, sponges, and infusoria, that he had for such a long time burned the midnight oil?