224 



BIOLOGY OF THE PROTOZOA 



similar division of the basal bodies of the cilia and grannies of the 

 silver line system has not been fully established. 



Other evidence of protoplasmic reorganization at division is 

 furnished by the history of some of the functional metaplastids of 

 the cell. Trichocysts are apparently handed down without change 



Fig. 114. — Glaucoma scintillans. A, individual at beginning of division with 

 silver line system. The beginnings of the month of the posterior daughter cell are 

 seen on striation No. 1. B—F, successive stages in formation of the posterior mouth. 

 (After Chatton, A. and M. Lwoff and Monod, Compt. rend. Soc. biol., 1931, courtesy 

 of Masson et Cie.) 



(Fig. 35, p. 67), but there is good evidence that the more compli- 

 cated aggregates of trichites are absorbed and replaced by new ones. 

 This is the case for example in the Chlamydodontidae, where the 

 complex oral baskets are replaced by new ones at each division 

 (Enriques, Nagler, MacDougall, et ah, Fig. 112). 



