io6 



ZOOLOGY 



A. Fasciola hepatica, from the ventral 

 surface ( x 2), the alimentary and 

 nervous systems only shown on the 

 left side of the figure, the excretory 

 only on the right. 



1. Eight main branch of the intestine. 



2. A diverticulum. 



3. Lateral ganglion. 



4. Lateral nerve. 



5. Month. 



6. Pharynx. 



7. Ventral sucker. 



8. Cirrus sac. 



9. Left anterior dorsal excretory vessel. 



10. Main vessel. 



11. Left anterior ventral trunk. 



12. Excretory pore. 



B. Anterior portion, more highly magni- 



fied. 



1. Cirrus sac. 



2. Ductus ejacnlatorius. 



3. Female aperture. 



4. Ovary. 



5. Oviduct. 



6. Penis. 



7. Shell gland. 



8. Anterior testes. 



9. Uterus. 



10. Vasa defereutia. 



11. Vesicula seminalis. 



12. Yolk gland. 



13. Its duct (from Marshall and Hurst, 

 after Sommer). 



C. Genital sinus and neighbouring parts. 



1 . Ventral sucker. 



2. Cirrus sac. 



