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HANDBOOK OF PROTOZOOLOGY 



tractile; inconspicuous cytostome widely dilated during the 

 passage of food material. Peristomal ciliary circle present, but 

 no neck-like constriction, nor proboscis. 



Chaenia teres Dujardin (Fig. 149, h). Length about 250 

 microns. In salt water. 



Fig. 149 a. Trachelocerca phoenicopterus. X40 (After Calkins), 



b. Track elo phyllum clavatum. X 75 (After Stokes), 



c, d. Lacrymaria olor. X200 (After Calkins). 



e, f. L. lagenula. X300 (After Calkins). 



g. L. cornata. X400 (After Calkins), 



h. Chaenia teres. X 140 (After Quennerstedt). 



i. Prorodon griseus. X250 (After Conn). 



Genus Prorodon Ehrenberg. Body constant in form; ovate; 

 rounded at the extremities. Cytopharynx conspicuous often 

 with rod-like structures. A single contractile vacuole posterior. 

 A massive macronucleus oval or band-form. Fresh or salt 

 water. 



