562 PROTOZOOLOGY 



E. fusidens K. (Fig. 267, g). Cylindrical, contractile; cilia dense 

 and rather long; macronucleus reniform, often appears as composed 

 of 2 spherical parts; contractile vacuole terminal; oral ring with 

 spindle-like trichocysts; food vacuoles not seen; extended body llO/x 

 long; contracted 75/^; sapropelic. 



Genus Homalozoon Stokes. Elongate; cilia conspicuous on flat- 

 tened right side; left side swollen or keeled; fresh water. 



H. vermiculare (S.) (Fig. 267, h). Extended body 450-850/i long; 

 vermiform; macronucleus band form; contractile vacuoles about 30 

 or more in a row; standing fresh water. 



Genus Cranotheridium Schewiakoff. Spathidium-like organisms; 

 anterior end obliquely truncate, near the extended side of which is 

 located the cytostome; cytopharynx surrounded by a group of 

 trichites; fresh water. 



C. taeniatum S. (Fig. 267, i). Anterior end flattened; with a group 

 of trichites; macronucleus long band-form; with many micro nuclei; 

 contractile vacuole terminal; ciliation and striation close; colorless; 

 movement slow; about 170/i long; fresh water. 



Genus Penardiella Kahl. Ellipsoid, somewhat compressed; oral 

 ridge slightly oblique; a girdle with trichocysts encircling the body; 

 fresh water. 



P. crassa (Penard) (Fig. 267, j). Elongate ellipsoid, flattened; tri- 

 chocysts in posterior portion of girdle are longer and those in the 

 dorsal region are fewer in number and shorter; macronucleus sau- 

 sage-form; contractile vacuole posterior, in front of the girdle; body 

 160/x by 50/x; sapropelic. 



Genus Perispira Stein. Ovoid or cylindrical; oral ridge turns 

 right-spirally down to posterior end. 



P. strephosoma Stokes (Fig. 267, k). Oval to cylindrical; about 85^ 

 long; standing water with sphagnum. 



Genus Legendrea Faure-Fremiet. Ellipsoid or ovoid; a peripheral 

 zone with small tentacular processes bearing trichocysts. 



L. heller o-phon Penard (Fig. 267, I). lOO-lSO/x; fresh water. 



Genus Teuthophrys Chatton and Beauchamp. Body rounded pos- 

 teriorly, anterior end with 3 radially equidistant, spirally curved 

 arms (counter-clockwise when viewed from posterior end); the de- 

 pressions between arms form furrows; cytostome apical, at the inner 

 bases of arms; contractile vacuole terminal; ciliation uniform, ex- 

 cept the inner surfaces of arms where longer cilia as well as tricho- 

 cysts are present; with zoochlorellae; macronucleus rope-shaped 

 and wound; micronucleus unobserved. One species. 



