PLATVHELMINTHES QI 
co CONTI OD 
Ovum Ww bore 
Fic. 63.—Plan of a Polyclad. 
. Brain. 
. Intestinal branches. 
. Anterior unpaired branch. 
. Longitudinal nerve cord. 
Mouth. 
. Oviduct. 
. Ovarian follicle. 
. Pharynx. 
. Pharyngeal pouch. 
10. 
Male 
12. 
13. 
é. 
9. 
After Von Graff. 
Stomach. 
Testicular follicle. 
Uterus. 
Vas deferens, 
Male copulatory organ, with the 
male aperture behind. 
Female copulatory organ, with the 
female aperture before it. 
The eyes are omitted. 
