30 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



5. Trailing flagellum in a furrow ; motile flagellum ter- 



minal Colponema 



Trailing flagellum not in a furrow 6 



6. Food taken in by a dorsal vacuole Plcuromonas* 



Food not taken in by a dorsal vacuole Bodo* 



7. Trailing flagellum in a mouth furrow, extending in 



a curve around the end and passing backwards on 

 the right side of body; body not flexible. .Anisonema* 



Like Anisonema, but with flexible body Metanema* 



Like Anisonema, but with trailing flagellum more 



posterior Heteronema* 



Like Anisonema, but with the trailing flagellum close 

 to the motile "flagellum, and with a very evident, 

 partly protrusible pharynx Entosiphon* 



Description of Genera. 



Bodo Ehrbg. = Heteromita Stokes. 



Small, without a lorica ; pear-shaped to spindle-shaped, 

 with one flagellum directed forward, and a trailing fla- 

 gellum. Mouth at base of flagellum. Pharynx frequently 

 developed. Nucleus and contractile vacuole present. 

 Many species assume an amoeboid stage. 



Stokes has described a large variety of forms under 

 the name Heteromita, that must be classed with this genus. 

 Many of his species I have identified as very common in 

 our water. 

 B. ovata Stokes, Fig. yy. 

 B.sp. (?),Fig. 78. 



B. globosa Stokes. Figs. 79 and 96 perhaps represent dif- 

 ferent species. 

 B. variabilis Stokes, Figs. 82-85. 

 B. aciis Stokes, Fig. 86. 

 Pleuromonas Perty. 



Kidney-shaped to spherical, slightly amceboid. One 

 anterior flagellum and a second in the middle of the ventral 

 depression. Contractile vacuole anterior, nucleus pos- 

 terior. Frequently attached by the posterior flagellum. 

 Food absorbed by a dorsal vacuole. 

 PL jaciilans Perty, Fig. 66. 



