HARRY M. MILLER, JR., AND FLORA E. NORTHUP. 



PLATE II. 



FIG. ii. C. quisselensis; redia with gut and birthpore, containing only one 

 fully formed cercaria. X 53. 



FIG. 12. Redia of C. quisselensis, packed with mature cercariae. X 47. 



FIG. 13. Ventral view of body of C. quissetensis; digestive and gland systems; 

 main trunks of excretory system; cell masses of future reproductive system. 

 X 162. 



FIG. 14. General view of C. quissetensis. X 93. 



FIG. 15. C. variglandis; dorsal view showing anterior organ (highly modified 

 oral sucker), eye spots, and three differentiated sets of gland cells. X 120. 



FIG. 16. Sagittal section of body of C. variglandis, showing especially the 

 different gland cells. X 385. 



FIG. 17. C. variglandis; free-hand diagram of flame cell pattern in body. 

 X 190. 



FIG. 1 8. C. quissetensis; immature redia, showing pharynx and gut, and 

 posterior locomotor appendages (on one side only). X 83. 



FIG. 19. Extended body of C. quissetensis, showing digestive, gland and 

 excretory systems, and reproductive system cell masses. X 200. 



FIG. 20. Cercariceum linloni; dorsal view showing digestive and gland systems, 

 cell masses of reproductive system, and excretory vesicle. X 398. 



FIG. 21. Sporocyst of C. lintoni, containing germ balls and mature cercariae. 

 X 70. 



