Plate XVI. 



Onchocotyle spinacis. 



Fig. 1. Cross-section through one of the hifurcated ends of the caudal appendage, 

 to show the structure of the small sucker, x 204 diam. 

 „ 2. Sagittal section through the same, x 204 diam. 

 „ 3. Cross-section of the body through the region of the ootyp. x 73 diam. 

 ,, 4. A portion of the section represented in fig. 3. x 204 diam. 

 „ 5. Cross-section of the uterus near the ootyp. x 204 diam. 

 „ 6. Cross-section of the uterus more removed from the ootyp. x 204 diam. 

 „ 7. Median sagittal section through the region of the genital opening. x 204 



diam. Only the ventral side is represented in detail. 

 „ 8. Median portion of a cross-section of the body not much removed from the 

 genital opening, x 204 diam. 



