smith: infusoria of Kansas. 153 



Prorodon edentatus C. & L. 



Body oval, cylindrical, rounded at the extremities. Mouth eccentrically 

 placed, leading into a simple tube-like pharynx. Macronucleus spherical. 

 Contractile vacuole single and posterior. Cilia at the posterior end 

 slightly longer than those of the general surface. Cuticular surface 

 longitudinally striated. 



This species was found but once in pond water after long standing. 



Length varies from 120 to 175 microns. Length of type specimens, 120 

 microns. (Fig. 2, plate XXXIII.) 



Prorodon UeberknJinii Bronn. 



The species, represented by fig. 4, plate XXXIII, seems to be identical 

 with one figured by Bronn in Klassen und Ordnung des Tierreichs under 

 the name of Prorodon lieberkuhnii. It is an elongated form, more than 

 ten times as long as broad. Mouth terminal, elevated above the surface 

 of the body. Pharynx conspicuous, longitudinally striated. Two oval 

 macronuclei located some distance apart. Contractile vacuole single, 

 postero-terminal. Cuticular surface finely striated longitudinally. Cilia 

 relatively long and fine, incoordinate in their movement. 



This form was seen but a single time in pond water. 



Length of type specimen 300 microns. (Fig. 4, plate XXXIII.) 



Genus Lacrymaria Ehr. 



Body flask-shaped and very contractile, especially m the neck region. 

 Oral aperture terminal, surrounded by one or more rows of cilia. Anal 

 aperture terminal or subterminal. Macronucleus spherical to elongate, 

 sometimes double, centrally located. 



Lacrymaria olor Mull. 



Body distinctly flask-shaped. Anterior extremity produced into a very 

 long, flexible, neck-like extension. Posterior extremity pointed. Cuticular 

 surface spirally striped. Mouth located in a cone-like projection Welcher 

 wie ein Pfropf dem Hals der Flasche aufsitzt, surrounded by a row of 

 long cilia Macronucleus double, centrally located. Two contractile 

 vacuoles. 



This is a very beautiful and graceful Ciliate found quite commonly in 

 both pond water and leaf infusions. 



Length of type specimen when fully extended, 355 microns; contracted, 

 100 microns. (Figs. 6 and 8, plate XXXIV.) 



Lacrymaria truncata Stokes. 



Body elongated flask-shaped. Anterior region narrow and neck-like. 

 Frontal border obliquely truncated. Cuticular surface longitudinally 

 striated. Cantractile vacuole postero-terminal. Macronucleus band-like, 

 very long, coiling back upon itself many times in the posterior region. 



Found commonly in hay infusions. 



Length of type specimen, 195 microns. (Fig. 10, plate XXXIV.) 



Family Trachelinim:. 



Body bilateral, left side flattened, right side convex. Mouth either 

 long and slit-like, extending well down the ventral surface, or round and 

 located some distance from the anterior end. Mouth region usually pro- 



