30 DAVENPORT ACADEMY OF SCIENCES. 



With two similar flagella, otherwise as Eiiglcna. 

 "^Ascoglcna Stein. 



Similar to Euglena but inhabiting a sessile tubular lorica. 

 '^Colaciinn Khr. 



Similar to Euglena, free-swimming or attached to a branched 

 pedicle. 



ASTASIID.E. 



Body elongated but plastic with no coloring substance. Fla- 

 gella one or two. 



Astasia Khr. 



Di stigma Ehr. 



^Mefioidiioii Perty. 



Lunate, flattened. Flagellum single. Endoplasm granular. 



''^Atractonema Stein. 



Elongated, spindle-shaped. Flagellum single, very long. 

 Pharynx distinct. 



Peranemid.E. 



Body persistent in shape and plastic. Flagella one or two. 

 Pharynx distinct. 

 Heteronema Duj. 

 Petalomonas Duj. 

 Ajiisonenia Duj. 

 EyitosipJion Stein. 

 ^Zygoselmis Duj. 

 Exceedingly plastic, resembling Astasia but with two flagella. 



NOTOSOIvENID.E. 



Persistent in shape. Flagella two, the trailing one very short. 

 Oral aperture indistinct. Endoplasm colorless. 



Notosolouis Stokes. 



Families and Genera of PhytoflagelIvIda. 



Chrysomonadid^. 



Usually enclosed by a gelatinous mass or firm membrane. Fla- 

 gella one or two. Often enclosing colored pigment bands. 



Nephrosehnis Stein. 



Mallomonas Perty. 



'^Ochromonas Wysotzki. 



