E U CILIA TA , HOLO TRICHIDA 



353 



which is a row of long cilia. The open circular cytostome is 

 situated at the base of the proboscis. Numerous contractile 

 vacuoles on the dorsal side or scattered. The body surface is 

 uniformly ciliated. Macronucleus moniliform. Conjugation. 

 Spherical cysts. Fresh or salt water. 



Dileptus anser Miiller (Figs. 4, h; 152, b). Extended body 

 1 mm. or more in length. In fresh or salt water. 



Genus Lionotus Wrzesniowski. Body elongated and flat- 

 tened. Ventral surface flat, dorsal surface convex. The an- 

 terior end is drawn out into a proboscis and the posterior end 

 terminates usually in a cone. A row of long cilia on the pro- 



Fig. 152 a. Trachelius ovum emerging irom a cyst. X65 (After Biitschli). 



b. Dileptus anser. X50 (After Biitschli). 



c. Lionotus fasciola. X 100 (After Calkins). 



d. Loxodes rostrum. XlOO (After Biitschli). 



e. Loxophyllum setigerum var. armatum. X350 (After Calkins). 



f. Amphileptus branchiarum. X370 (After Wenrich). 



boscis. The long slit-like cytostome is located on the ventral 

 side of the proboscis and is ordinarily closed. One to many 

 contractile vacuoles. Two spherical macronuclei. Fresh or salt 

 water. Several species. 



Lionotus fasciola Ehrenberg (Fig. 152, c). Body large 200 

 to 600 microns long. In fresh or salt water. 



Genus Loxodes Ehrenberg. Body elongated, flattened, and 

 more or less constant in form. Ventral surface flattened with 



