HOLOTRICHA 523 



middle and right-dorsal; about 80-95/x long; salt water, Florida 

 (Noland). 



Genus Cyclogramma Petty. Somewhat resembling Nassula; 

 but conspicuous oral basket in pyriform depression and opens 

 toward left on ventral surface; depression with a short row of 

 small membranes at its anterior edge; trichocysts usually better 

 developed than in Nassula; fresh water. 



C. (Nassula) trichocystis (Stokes) (Fig. 240, c). Body colorless 

 or slightly rose-colored; trichocysts thick and obliquely arranged; 

 one contractile vacuole; usually full of blue-green food vacuoles; 

 actively motile; about 60/1 long; in fresh water among algae. 



Genus Chilodontopsis Blochmann. Elongate ellipsoid; color- 

 less; ventral surface flattened, dorsal surface slightly convex; 

 both sides ciliated; oral basket without vestibule; cytostome with 

 a membranous ring; usually with a postoral cihary furrow; fresh 

 water. 



C. (Chilodon) vorax (Stokes) (Fig. 240, d). Elongate elhpsoid; 

 anterior region sHghtly curved to left; snout fairly distinct; oral 

 basket with about 16 rods; several contractile vacuoles dis- 

 tributed, a large one terminal; macronucleus large, lenticular, 

 granulated; with a closely attached micronucleus; 50-160jli long; 

 fresh water. 



Genus Eucamptocerca da Cunha. Elongate; posterior part 

 drawn out into a caudal prolongation; dorso-ventrally flattened; 

 cihation on both sides; round cytostome with basket in anterior 

 ventral surface. One species. 



E. longa de C. (Fig. 240, e). 300 fj. by 25^; macronucleus ovoid, 

 with a micronucleus; contractile vacuole(?); in brackish water 

 (salt contents 3 per cent); Brazil. 



Genus Orthodon Gruber. Oval; contractile; colorless; much 

 flattened; anterior region curved toward left; striation on both 

 dorsal and ventral sides; cytostome toward right border; oral 

 basket long; macronucleus oval; contractile vacuole terminal; 

 fresh or salt water. 



0. hamatus G. (Fig. 240,/). Extended 20-260ai long, contracted 

 90-1 50/i long; flask-shaped; oral basket with 16 trichites; salt 

 water. 



Family 2 Dysteriidae Kent 



Genus Dysteria Huxley (Ervilia, Dujardin; Iduna, Aegyria, 

 Claparede et Lachmann; Cypridium, Kent). Ovate; dorsal sur- 



