150 HANDBOOK OF PROTOZOOLOGY 



lorica, located at the end of the branched stalks. Fresh water. 



Dendromonas virgaria (Weisse) (Fig. 55, d). Pond water. 

 Body about 8 microns long; height of colony 200 microns. 



Genus Cephalothamnium Stein. Colonial without test, but 

 individuals are clustered at the end of a stalk which is colorless 

 and rigid. Fresh water. 



Cephalothamnium cyclopum Stein (Fig. 55, e). Body about 

 10 microns long. Attached to the body of Cyclops. 



Genus Anthophysa Bory. Colonial forms, somewhat similar 

 to Cephalothamnium. Stalks yellow or brownish and usually 

 bent. Detached individuals are amoeboid with pointed pseu- 

 dopodia. 



Anthophysa vegetans (Miiller) (Fig. 55, /, g). Common in 

 stagnant water and infusion. Body about 5 or 6 microns long. 



Genus Physomonas Kent. Solitary. Usually attached by 

 a filiform flexible pedicel; anterior end obliquely truncate. 

 No cytostome. Fresh or salt water. Some authors place this 

 genus with Monas. 



Physomonas socialis Kent (Fig. 55, A). Fresh water among 

 decaying vegetation. Body 5 to 10 microns long. 



Family 8 Bodonidae Biitschli 



With two flagella; one is directed anteriorly and the other 

 posteriorly and trailing. Flagella arise from the anterior end 

 which is drawn out to a varying degree. One or several con- 

 tractile vacuoles. Nutrition is holozoic or parasitic. Asexual 

 reproduction is by binary fission. 



Genus Bodo Ehrenberg ( = Prowazekia Hartmann and Cha- 

 gas). Small Protomonadida; ovoid, but plastic. Cytostome 

 anterior; a single nucleus central or anterior. Flagella are con- 

 nected with two blepharoplasts, near which is found a rounded 

 parabasal body. Encystment common. Very common in 

 stagnant water and infusion. Also frequently coprozoic. 



Bodo caudatus (Dujardin) (Fig. 56, a-i). Body about 10 

 to 20 microns long. 



Bodo edax Klebs (Fig. 56, j, k). About 10 to 15 microns 

 long. 



Genus Rhynchomonas Klebs. Similar to Bodo, but there 

 is an anterior extension of the body, in which one of the flagella 



