22 ANIMAL PARASITES 



cover. Fig. 1 represents the ordinary apijearance 

 of the egg when seen with a magnifying power of 

 about eighty diameters. We here see how the 

 egg is fastened to the hair, and why they stick so 

 firmly, being cemented as it were with a strongly 



glutinous substance. Fig. 2 shows the egg when 

 rendered transparent in the glycerine, and exam- 

 ined with a magnifying power of one hundred and 

 thirty under the microscope. The broad end of 

 the egg has a lip, to which is attached a conical 

 lid, studded with little nodular processes. This 

 lid falls off when the animal is ready to come out 

 of the shell. We see such a one at the side of the 



