SPIROTRICHA, CTENOSTOMATA 



601 



Fig. 272. a, Epalxis mirabilis, X1200 (Roux); b, Saprodinium den- 

 tatum, X430 (Kahl); c, S. putrinium, X470 (Lackey); d, Pelodinium 

 renijorme, X600 (Lauterborn); e, f, Discomorpha pectinata, (e, X500; 

 f, X220) (Kahl); g, Mylestoma bipartiturn, X470 (Kahl); h, Alopo- 

 dinium fibulatum, X520 (Kahl). 



Family 2 Discomorphidae Poche 



Genus Discomorpha Levander. Oval; ventrally directed an- 

 terior spine long; posterior end without teeth or ridges; ciUated 



