Fig. 7. Euglypha alveolata, x 60. From Hegner and Taliaferro, after Calkins. 





,-rfr.w. 



-^tr. 



a^'?iwc. 



Fig. 8. Fig. 9. 



Fig. 8. Clathrulina. A, Ordinary individual, X 200. B, Binary fission within 

 the lattice. C, Escaped flagellate individual. After Leidy. 

 Fig. 9. Part of a longitudinal section through a Paramecium showing the 

 trichocysts at the end of the body discharged, and in the endoplasm material 

 for the replacement of trichocysts. From Saunders, after Mitrophanov. 

 nuc. meganucleus; tr. undischarged trichocysts; tr.' discharged trichocysts; 

 tr.m. material for replacing trichocysts. 



