104 ILLINOIS BIOLOGICAL MONOGRAPHS [321 



PLATE VIII 



All figures magnified 44 times 



Fig. 30. Ventral view of anterior end of Cyclocoelum pseudomicrostomum. 



Fig. 31. Ventral view of anterior end of Cyclocoelum braziiianum. 



Fig. 32. Dorsal view of anterior end of Cyclocoelum mutabile. 



Fig. 33. Ventral view of anterior end of Cyclocoelum leidyi. 



Fig. 34. Ventral view of anterior end of Cyclocoelum elongatum. 



Fig. 35. Ventral view of anterior end, of Cyclocoelum braziiianum, cirrus extruded. 



