REPRODUCTION 



219 



p. 







P.'1 



P:^i fO 





/^4 I 



,^>^ 



\ -, \ 



Fig. 103. — Paramecium caudatum, merotomy. 1, 2, and 3, different experiments 

 the straight line indicating the plane of cutting; 3, the history of a monster; an original 

 cell 3a, was cut as indicated; the posterior fragment (b) divided (c) into (d) and (e), 

 the latter formed a monster (3, /,-o); enucleated individuals {h, k, and n) occasion- 

 ally separated from the parent mass. (After Calkins.) 



