64 



BIOLOGY OF THE PROTOZOA 



Fig 32.-Uroleptus mobilis Eng. First and second meiotic divisions during con- 

 jugation. (A) Two conjugating individuals; (B to G) formation of the first spind e 

 pole by division of the endobasal body (with centrodesmose) ; (H to M) first meiotic 

 nuclear division; (.V to Q) second meiotic division. (After Calkins.) 



