ROBERT HEGNER 



66i 



resembles Trichomonas in shape but lacks the undulating membrane and axostyle and 

 possesses a conspicuous cxtostome. Embadomonas intestinalis and Triccrcomonas intestinalis 

 are rare species. The human species of Giardia (Fig. 8) is a bilaterally symmetrical organism 



INTESTINAL AMEBAE 

 Fig. la. — Endamoeha coli, trophozoite 

 Fig. \h. — Cyst of same 

 Fig. 2a.— Endamoeha histolytica, trophozoite 

 Fig. 26. — Cyst of same 

 Fig. 3a. — lodamoeha williamsi, trophozoite 

 Fig. 3Z). — Cyst of same 

 Fig. 4. — Endamoeba gingivalis 

 Fig. 5a. — Endolimax nana, trophozoite 

 Fig. 5&. — Cyst of same 



Figs. 1-5 were drawn by Mr. Herbert Ratcliffe with a camera lucida from specimens fixed in 

 Schaudinn's solution and stained with iron-hematoxyUn. All are magnified 2,000 diameters. 



