354 HANDBOOK OF PROTOZOOLOGY 



longitudinal rows of cilia, the dorsal surface convex. Stronger 

 cilia are present on the margin. Anterior end is bent toward 

 one side and just below it is a slit-like cytostome. Cytopharynx 

 is small and indistinct. Numerous nuclei and contractile 

 vacuoles. Fresh water. 



Loxodes rostrum Miiller (Fig. 152, d). Body about 300 to 

 375 microns long. In stagnant water. 



Genus Loxophyllum Dujardin. Body flattened; ventral sur- 

 face flat; dorsal surface convex. Anterior end narrowed; hyaline 

 cytoplasm asymmetrically arranged. Cytostome straight slit- 

 like with trichocysts on the border in papilla-like groups or 

 scattered. Nucleus simple to moniliform. One to many con- 

 tractile vacuoles, posterior. Fresh or salt water. 



Loxophyllum setigerum var. armatum (Claparede and Lach- 

 mann) (Fig. 152, e). Body about 100 microns long. In salt 

 water. 



Loxophyllum meleagris Ehrenberg. Pond water. 



Genus Amphileptus Ehrenberg. Body flask-shaped, some- 

 what compressed. Anterior end is drawn out into an acute 

 proboscis at the base of which is located the cytostome. Con- 

 tractile vacuole one to many. One or two macronuclei. Fresh 

 or salt water. 



Amphileptus claparedei Stein. Fresh or salt water. 



Amphileptus branchiarum Wenrich (Fig. 152,/). On the skin 

 and gills of the tadpole of common frogs (Rana). Swimming 

 individuals killed with iodine, measure 100 to 135 microns long 

 by 40 to 60 microns broad. 



Family 4 Chilodontidae Biitschli 



Body is usually flattened. Ciliation seems to be limited to 

 the oral surface. Cytostome is surrounded by trichites, pre- 

 senting a basket-like appearance. Free-living; a few parasitic. 



Genus Chilodon Ehrenberg. Body small to medium large; 

 on the whole dorso-ventrally flattened, flexible. Dorsal surface 

 convex, ventral surface flat. Uniformly ciliated. Cytostome 

 in the center of the anterior half and toward the left. Pharyn- 

 geal basket is protrusible beyond the cytostomal aperture. 

 Contractile vacuole variable in number; macronucleus oval, 

 central. Cysts oval. Common in fresh or salt water infusion. 



