No. 2.] FRESH-WATER PROTOZOA. 2/ 



euglenoid movements of this genus. I place it here with 

 some doubt, although it does not agree with any Other 

 genus known to me. 

 Eutreptia Perty. 



Like Euglena, but with two equal flagella. When ex- 

 tended, body is spindle-formed and very flexible. A deli- 

 cately marked 'cuticle. The body contains disk-formed 

 chromatophores without pyrenoids ; paramylum bodies 

 cylindrical. 

 Eiit. viridis Perty, Fig. 48. 

 Trachelomonas Ehrbg. 



Animals like Euglena; free swimming, with a rigid 

 spherical to ovate or cylindrical lorica which is either 

 smooth, sculptured, or spiny. Lorica colorless, or colored 

 red to brown. The flagella three to four times as long as 

 the body. Disk-formed chromatophores with pyrenoids 

 and paramylum bodies present. 

 Tr. lagenella ( ?) Stein, Fig. 53. 

 Tr. hispida Stein, Fig. 54. 

 Tr. volvocina Ehrbg., Fig. 59. 

 Lepocinclis Perty. = Chloropeltis Stein. 



Ellipsoidal, round or slightly compressed, with promi- 

 nent longitudinally or spirally marked cuticle, sometimes 

 armed with spines. Near the flagellum a short tube, or a 

 short pharynx. Posterior end acute. Paramylum bodies 

 sometimes large and snake-like. 

 Lep. sp. (?), Fig. 61. This animal, found abundantly, is 

 with some doubt referred to this genus, the short caudal 

 extremity being unlike the typical forms of Lepocinclis. 

 Phacus Nitzsch. 



Usually much flattened, asymmetrical, round to oval 

 or pear-shaped. Commonly with a sharply differentiated, 

 colorless, caudal process which is sometimes oblique. 

 Mouth on the back ; cuticle thick and marked by longi- 

 tudinal or spiral stripes. Chromatophores and paramylum 

 bodies disk-shaped. One flagellum, with the vacuole sys- 

 tem and eye-spot, as in Euglena, and a posterior nucleus. 

 Ph. pyrum Ehrbg., Fig. 62. 

 Ph. pleuronectes Nitzsch, Fig. 63. 

 Ph.sp. (?),Fig.64. 



