170 



CLASS: RHIZOPODA 



have no shell, they merely become spherical and form a cyst; if they are 

 shelled, they escape from the cyst first. The cysts vary from 6 to 17 

 microns in diameter. Multiplication takes place by division of the 

 nucleus, followed by the extrusion, through the pore, of half the cytoplasm 

 into which one of the nuclei passes. A new shell is secreted round this 

 portion with its pore directed towards that of the original shell. Finally, 

 division of the narrow neck of cytoplasm uniting the two shelled individuals 

 takes place. 



Schaudinn (1903) stated that the cysts of Chlamydophrys stercorea 

 passed through the human intestine, and that sometimes the amwbse 

 escaped from their cysts and multiplied while still in the intestine. He 



Fig. 82. — Chlamydophrys stercorea feom Pigs' F^ces ( x 1,000). (Original.) 



A. Ordinary individual. Clear area round nucleus is the chromidial body. 



B. Process of binary fission: daughter individual being formed as a bud. 



also made the statement that a supposed amoeba, Leydenia gemmipara, 

 which Ley den and Schaudinn (1896) had found in human ascitic fluid, 

 was no other than the free amoeboid stage of Chlamydophrys stercorea 

 which had wandered from the intestine to the peritoneal cavity. There 

 seems to be no evidence of this whatever, and as Schaudinn was unaware 

 of the existence of such parasitic forms as Endolimax nana, it is highly 

 probable that the amoebae he saw in the human intestine and regarded 

 as C. stercorea were in reality E. nana. As to the nature of Leydenia 

 gemmipara, there is no reason to suppose that it was anything more than 

 body cells in a degenerate condition in the peritoneal exudate. 



Belaf (1921) has reviewed the genius Chlamydophrys, and concludes 

 there are six distinct species, which differ from one another in size, method 



