230 



FAMILY: AM(EBID^ 



E. polecki. Noller (1921) states that Feibel in Germany had seen this 

 amoeba in pigs, while Cauchemez (1922 a) describes it from pigs in France. 

 The writer has seen it in pigs in England, and it was also met with by 

 O'Connor in the Ellice Islands. According to Cauchemez, the amoeba 

 is nearly always uninucleated, and varies in diameter from 5 to 12 

 microns when round. When elongate, it measures 15 by 5 microns. 

 Rarely binucleate forms were seen. The amoebae resemble the precystic 

 forms of E. histolytica. Noller (1922), who emphasizes its resemblance to 

 E. histolytica, states that the amoeba varies in diameter from 12 to 25 



7 8 9 



Fig. 106. — Intestinal Amceb^ of Pigs ( x 2,500). (After Niesciiulz, 1923.) 



1-2. Enlammha polecki, free forms. ,3-.'5. E. dehliecki. free forms. 



G. E. dehliecki, encysted form. 7-8. lodamceba bi'itscMii, free forms. 



9. /. biUschlii, encysted form. 



microns, and that uninucleate cysts 12 to 15 microns in diameter occur. 

 The latter may contain numerous splinter-like chromatoid bodies. Douwes 

 (1921) described four- nucleated cysts with a diameter of 5 to 8 microns. 

 Whether these are the mature cysts of a small race of the entamoeba 

 of the pig or some other form is not clear. The correct name for this 

 amoeba is evidently E. polecH Prowazek, 1912, though some of the forms 

 figured by Prowazek undoubtedly do not belong to this ama?ba. The 

 name E. suis becomes a synonym. The amoeba cultivated from pig 



