6o 



COLLEGE ZOOLOGY 



of metazoan eggs (Chap. Ill, p. 81). Reference to Figure 40 

 will help to make clear the following description. The micro- 

 nucleus moves from its normal position in a concavity of the 



FIG. 40. Paramecia conjugating, a-q, stages in the nuclei during con- 

 jugation and the subsequent divisions of the conjugants during the period of 

 nuclear reconstruction. The original macronuclei have been omitted except 

 in stage a. (After Calkins and Cull.) 



