EDMONDSON — PROTOZOA OF IOWA. 29 



^- Cephalothamnhivi Stein . 



Body pyriform, anterior border oblique. Forming colonies at 

 the extremities of a branched pedicle. 



Families and Genera of Choanoflagellida. 



Craspedomonadid.'E. 



Solitary or forming colonies. Individuals, naked, inhabiting 

 loricae or embedded in a gelatinous mass. 



Mouosiga Kent. 



Codosiga James-Clark. 



Families and Genera of HeteromAvSTigida. 



BODONID^. 



Minute forms with flagella of nearly equal size. No lorica or 

 membranous covering. 



Heteromita Duj. 



"^PhyUomitiis Stein . 



Body elongate-oval, mouth prominent. One of the two flagella 

 trailing. 



Families and Genera of Polymastigida. 



POLYMASTlGIDyE. 



Flagella usually arranged in two groups. Food ingested at 

 the base of each group. 



Trepomonas Duj. 



'^Hcxamihis Duj. 



With four anterior vibratile flagella in two groups, and two 

 trailing flagella. 



Families and Genera of Euglenida. 



euglenid.e.. 



Elongated forms usually with a single flagellum. Pigment 

 spot and chlorophyl often developed. 

 Eiiglcna Ehr. 

 Phaais Nitzsch. 

 Chloropdtis Stein. 

 Cryptoglena Ehr. 

 TracheloDwnas Ehr. 

 '^Eiitreptia Perty. 



