366 Cc. H. MARTIN. 
scattered irregularly throughout the cytoplasm render it 
dificult to attain to absolute certainty as to the mode of 
ScuEemMe I.—General scheme to illustrate the behaviour of the 
micronuclei of Ciliates in relation to conjugation—after Maupas. 
Micronuclei small black dots. Degenerating micronuclei small 
circles. New macronuclei large circles. 
development of the new micro- and macro-nucleus. At first, 
I believed the normal process of reconstruction involved the 
ie i 
Scuemess II and II].—Diagrammatic schemes to illustrate the 
two possible modes of nuclear reconstruction after conjugation in 
A. papillifera. 
erowth of two of the four micronuclei into macronuclei, 
and their subsequent fusion (Scheme II). Later, however, I 
