io6 



THE INVERTEBRATA 



Fig. 91. 



Fig. 92. 

 Fig. 91. A group of individuals of Vorticella in various phases of the life 

 history. From Borradaile. a, Ordinary individual. 6, The same contracted. 

 c, Ordinary fission, d, A later stage of the same, e, Free-swimming individual 

 produced by ordinary fission. /,/', Two modes of fission to form microcon- 

 jugants (/, budding;/', repeated fission of one product of a binary fission). 

 g, Conjugation. 



Fig. 92. Carchesium epistylidis, x 100. After Saville-Kent. 



