130 HANDBOOK OF PROTOZOOLOGY 



MuUicilia marina Cienkowski (Fig. 44, a). With a single 

 nucleus. About 20 to 30 microns in diameter. Marine. 



MuUicilia lacustris Lauterborn (Fig. 44, h). Multinucleate. 

 Body diameter 30 to 40 microns. Fresh water. 



MuUicilia paliistris Penard. Fresh water. 



Family 2 Rhizomastigidae Biitschli 



The members of this family possess one to three, rarely 

 four flagella and also axopodia or lobopodia. Thus they com- 

 bine the chief characteristics of the Mastigophora and Sarco- 

 dina. Because of the constant presence of the flagella, they are 

 ordinarily considered as belonging to the Mastigophora. There 

 is a single nucleus. The flagellum arises from a basal granule 

 which is often connected with the nucleus by a rhizoplast. 

 Asexual reproduction is binary fission which takes place both 

 in trophic and encysted stages. Sexual reproduction has been 

 reported in one species. Method of nutrition is either holozoic 

 or parasitic. Free-living and a few parasitic forms. 



Genus Mastigamoeba Schulze. Monomastigote, uninu- 

 cleate, with finger-like pseudopodia. Flagellum long and arises 

 from the nucleus. Fresh water and soil. 



Mastigamoeba aspera Schulze (Fig. 44, c). Large form. 

 150 microns in diameter. 



Genus Mastigina Frenzel. With a single flagellum which 

 arises from the nucleus located at one end. Body surface is 

 tough, being frequently covered by ciliary projections, and 

 shows a little tendency toward pseudopodial formation. Roll- 

 ing movement. Fresh water, soil, or parasitic. 



Mastigina setosa Goldschmidt (Fig. 44, d). Body length up 

 to 140 microns. 



Mastigina hylae Frenzel (Fig. 44, e). In the large intestine 

 of many species of frog. Body about 100 microns long. 



Genus Mastigella Frenzel. With a flagellum which is not 

 connected with the nucleus. Pseudopodia numerous, digitate. 

 Body-form changes actively and constantly. Contractile 

 vacuole. 



Mastigella vitrea Goldschmidt (Fig. 44, /). 150 microns 

 long. Sexual reproduction has been reported to occur by 

 Goldschmidt. 



