AN INTRODUCTION TO ZOOLOGY 



/.n. 



m.n. 



FIG. 32. Two views of the micronuclei during the conjugation of Paramecium. 

 A, the spindle formed during the division of the micronucleus which 

 results in the production of a large female nucleus (f. n.) and a smaller 

 male nucleus (m. n.) ; B, the fusion of the male nucleus (m. n.} of one 

 animal with the female nucleus (/. n.} of the other conjugant. (From 

 Calkins and Cull, in Archiv f. Protist.) 



