1921] Kofoicl-Swczy: Councilmania la/lcuri 187 



SUMMARY 



Cauncilmania lafleuri, gen. nov., sp. nov. 



Free stage with hyaline pseudopodia, abruptly formed, endoplasm 

 filled with food vacuoles, and even ingested red blood corpuscles, rest- 

 ing nucleus with moderately thin zone of peripheral chromatin, karyo- 

 some generally excentric, often with small halo, in premitotic stages 

 composed of dispersed particles and more nearly central in location. 

 Pseudopodia broad, rounded, usually less than diameter of the body 

 in width, generally single. Cysts with one, two, four, or eight nuclei, 

 rarely more, thick walled, triple contoured, spheroidal, ellipsoidal or 

 asymmetrical, less frequently spherical. Nuclei of cysts with little 

 peripheral chromatin and large, excentric or central, spheroidal, reni- 

 form, or lobed karyosome often divided into scattered particles, eight 

 chromosomes, and an intradesmose joining polar ma-sses seen best in 

 first and second mitoses. The cysts form a chromophile ridge from 

 which cytoplasm emerges through a pore in the cyst wall as a chromo- 

 phile bud. A nucleus migrates into the bud which detaches as an 

 amoebula. The process is repeated till the cyst is emptied of nuclei. 

 Budding may occur in the bowel. Free stages from 63 by 35 microns 

 to 20 to 35 microns when rounded up ; spheroidal cysts 16 to 20, rarely 

 8 to 34, microns in diameter. Parasitic in the human intestine. Type 

 species Cmmcilmania lafleuri. 



