EDMONDSON — PROTOZOA OF IOWA. I I3 



Episfylis plicatilis IS one. oi the abundant species of this genus 

 found in running streams and fresh water pools in Johnson county. 

 It may be found on the under side of stones, leaves, etc., often 

 associated with Epistylis artiadata. The suctorian PodopJirya 

 qiiadripartita may be attached to the branches of this species in 

 great numbers; also specimens observed by the writer bore an- 

 other minute species of Epistylis not illustrated and not identified. 



Figure 200 represents a portion of a colony. Figure 201 rep- 

 resents a single zooid contracted. 



VAGINICOI^A Lamarck. 



Body elongate, somewhat cylindrical, inhabiting a vase-shaped 

 lorica. Ciliary and oral systems similar to those of I'orticel/a. 

 L,orica tran.sparent and sessile. 



Vaginicola sp. 



Lorica cylindrical, not quite twice as long as broad, wider and 

 broadly rounded posteriorly. Anterior extremity truncate, with 

 a conspicuous, cleft-like notch in the margin. Character of bodj' 

 undetermined. 



Length of lorica, 120 microns. (Fig. 204, PI. XXVIII.) 



Members of this genus are apparently rare in this state, the 

 individual figured being the only one observed, and that under 

 conditions which prevented a study of the extended body. The 

 organism was fixed with other Infusoria before it came under my 

 observation. Two contracted bodies indicates that longitudinal 

 division had recently occurred, both individuals being yet within 

 the lorica. 



Found in Johnson county. Habitat, fresh water, among algae. 



COTHURNIA Ehrenberg. 



Body as in Vagijiicola, inhabiting a lorica with a short stalk. 



COTHURNIA IMBERBIS F^hr. 



Length of lorica about one and one-half times the breadth, 



wider posteriorly, the anterior border evenly truncate. Stalk 



short. Body, when fully extended, projecting but little beyond 



the margin of the lorica. Nucleus band-like, short and curved. 



Length of lorica, 100 microns. (Fig. 205, PI. XXVIII.) 



[Proc. D. a. S., Vol. XI. J 15 LJune iS, 1906.! 



