PLATE XXIII. 



Intestinal Protozoa (after Wenyon). 



Entamoeba coli. 



a. Small entamceba, nearly spherical, with vacuolated cytoplasm. 



b. Large entamceba of irregular form. 



c. Encysted form with eight nuclei as it appears in the faeces. 



Entamoeba, histolytica. 



d. Large tissue-invading form containing the remains of live red-blood 



corpuscles. 



e. Large tissue-invading form, with pseudopodium and containing the 



remains of two red-blood corpuscles. 

 /. Encysted form with four nuclei as it appears in the fasces. 



Endamoeba Umax. 



g. Form without pseudopodium showing characteristic nucleus. 

 h. Form with pseudopodium. 



Trichomonas intestinalis. 



i. Flagellate of normal structure and free flagella. 



k. Degenerate form which has lost the flagella and axostyle and has the 

 appearance of an amoeba with an undulating border. 



Giardia (Lamblia) intestinalis. 



I. Surface view showing sucking disc, two nuclei and eight flagella. 



m. Side view of thick form. 



n. Encysted form with four nuclei. 



o. Encysted form containing two flagellates. 



Tetramitus mesnili. 



p. Form showing flagellum in cytostome. 



g. Encysted form with single nucleus and visible cytostome. 



r. Cercomonas. s. Bodo. t. Prowazekia. 



u. Balantidium coli as met with in the bowel and tissues. 



v. Blastocystis. x. Red-blood corpuscle. 



All the figures are drawn to the scale shown, except u, which is half the size 

 it should be. 



