No. 2.] FRESH-WATER PROTOZOA. 3 1 



Dinomonas Kent. 



Agreeing with Bodo in most respects. In moving both 

 flagella are carried forward. 

 D. vorax (?) Kent, Fig. 67. 

 Phyllomitus Stein. 



Ovate, elongate, very flexible. A prominent mouth 

 opening in front ; with two flagella, one directed forward, 

 the other backward. One anterior, contractile vacuole; 

 nucleus anterior. Motions quick. 

 Ph. amylophagus (?) Kleb., Fig. 68. 

 Spiromonas Perty. 



Body elongated and spirally twisted. Both flagella 

 arise in front, one of them trailing. 



The. genus Spiromonas of Perty is insufficiently de- 

 scribed for identification. Our specimen is certainly not 

 the one described by Perty, but would seem to be properly 

 " placed in the genus Spiromonas. 



S. sp. (?), Fig. no. 

 Elvirea Parona. 



Ovate to elongate, laterally compressed. Three flag- 

 ella, the middle one the shortest, the other two trailing. 

 Mouth and nucleus anterior. 

 El. cioncB Parona, Fig. 100. 

 Anisonema D u j . 



Body generally nearly oval, flat and asymmetrical, 

 rigid. The ventral side with a depression extending 

 toward the right, which is guarded by a lip on its right- 

 hand border. The motile flagellum arises from the middle 

 of the anterior end, and behind it is a mouth-opening 

 leading into a long pharynx. The prominent trailing fla- 

 gellum arises on the left side in the mouth depression, and 

 extends around the front end in a curve, to pass backward 

 upon the right side of the above-mentioned lip. Vacuole 

 system anterior and nucleus further back. 

 A. acinus Duj., Fig. 80. 

 A. sp. (?), Figs. 75, 76. 

 Metanema Klebs. 



Like Anisonema, but with body flexible. 

 M. sp. (?), Fig. 81. 



