216 



BIOLOGY OF THE PROTOZOA 



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m 



Fig. 108. — 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, f-o); enucleated individuals (h, k, and n) occasion- 

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



