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FIG. 24. Parts of Paramecia showing cilia and trichocysts. A, Surface vie\v 

 showing striations, cilia, and trichocysts (tr.) ; B, part of a cross section 

 showing ridges (L) on the surface, cilia (C) coming from microsomes 

 (B), trichocysts cut longitudinally (T) lying in the ectosarc (Co), and 

 trichocysts (T 1 ) and a food vacuole (2V) lying in the endoplasm (En). 

 C, trichocysts in various stages of extrusion ; Tk, body of the structure ; 

 Tf, the hairlike projection. (A from Schuberg ; B, C from Maier in 

 Archivf. Protist.) 



