ILLUSTRATIONS. 



(From photomicrographs by Charles Martin.) 



Plate I. 



Fig. 1. Amoeba 1, trophozoite, culture from the Manila water supply. X 1000. 



2. Amoeba 1, cysts, culture from the Manila water supply. X 1000. 



3. Amoeba 19, trophozoite and cyst, culture from the Manila water supply. 



X 1000. 



Plate II. 



Fig. 4. Amoeba 8, trophozoite and cysts, culture from a stool of a case of amoebic 

 dysentery. X 1000. 



5. Amoeba 14,966, trophozoites, culture from a stool of a case of amoebic 



dysentery. X 1000. 



6. Amoebae 7,671, trophozoite, culture from a stool of a case of amoebic 



dysentery. X 1000. 



Plate III. 



Fig. 7. Amoeba 7,671, cysts, culture from a stool of a case of amoebic dysentery. 

 X 1000. 

 8. Amoebae "L" (Musgrave and Clegg), trophozoite, culture from a stool of 

 a case of amoebic dysentery. X 1000. This species differs from 

 Amoeba 7,671 (figs. 6 and 7) chiefly in not possessing a contractile 

 vacuole. 



Plate IV. 



Fig. 9. Entamceba coli, trophozoite, in the stool of a healthy person. X 1000. 



10. Entamoeba coli var. niponica. trophozoite, in the stool of a healthy person. 



X 1000. 



11. Entamoeba coli, cyst containing 8 nuclei only 5 of which are shown in 



the optical section of the entamoeba, in the stool of a healthy person. 

 X 1000. 



12. Entamoeba histolytica, trophozoite containing red blood corpuscles, in the 



bloody and mucus stool of a case of amoebic dysentery (No. 5,748). 

 X 1000. 



Plate V. 



Fie. 13. Entamoeba histolytica var. tetragina, trophozoite containing red blood 

 corpuscles, in the stool of a case of acute amoebic dysentery. XIOOO. 



14. Entamoeba histolytica, trophozoite in preparation for encystment, in tlie 



stool of a ease of chronic amoebic dysentery. XIOOO. 



15. Entamoeba histolytica, encysting entamoeba showing the first division of 



the nucleus, in the stool of a chronic case of amoebic dysentery. XlOOO. 



16. Entam,(jeba histolytica, cyst containing 4 nuclei, in the stool of a chronic 



case of amoebic dysentery. XIOOO. 



279 



