PARAM^CIUM CAUDATUM EHRENBERG 9 



canal firmly with a forceps and pull it out. Place it on a slide 

 and squeeze out the contents. Remove the alimentary canal, 

 cover the drop with a cover glass and examine under low power. 

 Find two associated individuals of the mealworm gregarine and 

 make a drawing of them. Label protomerite, deuteromerite 

 with the nucleus, exoplasma and endoplasma. 



11. Additional exercise. Examine a prepared slide with a 

 stained transverse section through an earthworm in the region 

 of the sexual organs. Find as many stages of the gregarines as 

 possible and make drawings of them. One may count on find- 

 ing encysted individuals in stages of sporogony and spores of 

 the second generation with eight sporozoits in each. 



12. Additional exercise. Examine a prepared slide with trans- 

 verse sections through the alimentary canal of the centipede 

 Lithobius and find as many stages of the coccidium as possible. 

 Stages of schizogony, macrogametocytes and microgametocytes 

 may be found in the intestinal endothelial cells, cysts in the 

 lumen of the intestine. 



