SPIROTRICHA, CTENOSTOMATA 667 



3 often long ribbon-like cirri on peristome; fresh or salt water. Sev- 

 eral species. 



M. bipartitum (Gourret and Roesner) (Fig. 313, g). 35-50/x long; 

 two caudal processes; salt water. 



Genus Atopodinium Kahl. Posterior left side with one large, and 

 right side with 2 indentations; macronucleus spherical; sapropelic. 



A.fihulatum K. (Fig. 313, A). 40-50m long. 



References 



Kahl, A. 1932 Ctenostomata (Lauterborn) n. subord. Arch. f. 



Protistenk., Vol. 77. 

 1932 Urtiere oder Protozoa. In Dahl's Die Tierwelt Deiitsch- 



lands. Part 25. 



