354 Ciliophora 



Fig. 7. 12. A. Blepharocorys curvigiila Gassovsky, x480 (after Hsiung). B. 

 Blepharocorys equi Schumacher, x940 (after S.). C. Charon equi Hsiung, 

 xlOOO (after Hsiung). D-F. Clathrostoma viininale Penard (after P.), US- 

 125/i: ventral view (D), lateral view (E), ventrally protruded cytostome (F). 

 G, H. Colpoda steinii Maupas, ciliary meridians (G), ciliature (H); x750 

 (after Burt). I. Tillina coTialifera Turner, 150-200yLt, left lateral view showing 

 oral groove and ventral lip of cytostome (after T.). J, K. Woodruffia meta- 

 bolica Johnson and Larson: ventral view of peristomial area (J), x450; 

 cross-section of oral groove (K) showing undulating membrane {um), a 

 membranelle {m) and two somatic cilia (c), schematic (after J. & L.). 



The family contains a single genus, Clathrostoma Penard (102, 165; Fig. 7. 12, D-F), 

 to which three fresh-water species have been assigned. 



Family 3. Colpodidae. The mouth, in the anterior half of the broad oral 

 surface, may be funnel-shaped, approximately triangular, or sometimes 

 elongated. The wall of the oral groove is often more or less perpendicular 



