OF THE ALIMENTARY TRACT 



109 



to move across a clear field in rapid progression. Its 

 ectoplasm is clear and hyaline, its pseudopodia hya- 

 line, broad, and frequently thrust out in a sudden 

 manner. The endoplasm is granular and food par- 

 ticles may usually be seen in it. The nucleus is 

 usually not to be seen in such specimens. 



Stained with the blood film stains the amoeba is 



Fig. 19. — ■Endamoeba gingivalis. 

 Drawings of specimens stained by iron-haematoxylon. x 1200. 



conspicuous. The ectoplasm and pseudopodia are 

 deep blue, the endoplasm is lighter blue and contains 

 purplish nuclear particles of ingested body cells and 

 possibly pink erythrocytes or remnants. While the 

 nuclear detail is not brought out in such preparations 

 it may be seen as a red body. Variously stained 

 bacteria occur in vacuoles in the endoplasm. 



The nucleus is best studied in iron-haematoxylon 

 preparations, which also reveal the parts and ingested 

 objects of the parasite. The nucleus is rounded, there 



