Fni. 206.— Types of Ciliata. .1, Condylostoma patens; B, Metopus sigmoides; 

 C, Nyctotherus cordiformis. (A, after Calkins; B, c, after Biitschli.) 





A B C 



Fig. 207. — .4, Stephanopogon colpoda; B, Peritromus emmat ; < ', Onychodromus grandis; 

 c, cirri. (From Calkins after Biitschli.) 



(511) 



