54 davenport academy of sciences. 



Families and Genera of Holotricha. 



Knchelinid^. 



Mouth terminal or sub-terminal. Food ingested by swallowing. 



Coleps Ehr. 



Holophrya C. & L. 



Urotricha C. & L. 



Enchclyodo7i C. & L. 



Prorodon Ehr. 



Trachelophylluin C. & L. 



Didiniiun Stein. 



Mesodinium Stein. 



Lacrymaria Ehr. 



TRACHELINIDiE. 



Body usually bilateral with dorsal surface convex. Mouth 

 terminal or sub-terminal. A neck-like region often present. 

 Loxophylhan Duj. 

 Amphileptns Stein. 

 Dileptus Duj. 

 Lionotus Wrzes. 

 Loxodes Ehr. 

 Tracheliiis Ehr. 



Chlamydodontid.-e. 



Oval or kidney-shaped. Pharynx distinct, often provided with 

 rods. 



Nassula Ehr. 



Chilodon Ehr. 



^gyria C & L. 



^Opisthodon Stein. 



Oval, convex dorsally, flattened ventrally. Mouth in posterior 

 half of body. Pharynx with rods. 



Chiliferid^ 



Mouth anterior or central, usually with an undulating mem- 

 brane. Pharynx short or absent. 



Trichoda Miill. 



Leucophrys Ehr. 



Glaucoma Ehr. 



