- 42 - BILHARZIA. 



75. Terminal-spined Eggs. Examine a fresh preparation of the urine of a man 

 infected with Bilharzia hoematobium. Draw the eggs, showing egg-capsule with terminal 

 spine and contained miracidium. 



76. Lateral-spined Eggs. Examine a fresh preparation of the tseces of a man 

 infected with Bilharzia mansoni. Draw the eggs, showing egg-capsule with lateral spine 

 and contained miracidium. 



77. Miracidium. Irrigate one of the above preparations with water. Watch an 

 egg for some minutes and observe the escape of the miracidium. Make drawings showing 

 egg-capsule ; miracidium with cilia, terminal projection for boring into snail, head-glands, 

 gut, germ-cells, transverse band of nerve-fibres. 



