Plate VIII. 



AxiNE HETEROCEKCA. 



Fig. 1. A portion of tlie cross-section of the body some distance behind the common 



genital opening, x 204 diam. 

 „ 2. A small portion of the cross-section of the body through the anterior part 



of the brain, x 204 diam. a, nerve cells. 

 „ 3. Median sagittal section of the body through the region of the common 



genital opening, x 204 diam. 

 „ 4. Median sagittal section through the vagina, x 204 diam. x, an opening 



of unlmown nature. 

 „ 5. Ovary and the genital ducts adjoining it. x 50 diam. 



