594 ^- ^- Potts, Mycetoraorpha. 



Fig. 4. Portion of rootsystem, running underneath the ventral nerve 

 cord of Q-angon, stained and mounted whole. 



Fig. 5. Transverse section about the middle of the body showing 

 developing eggs in the visceral mass and the mantle. 



Fig. 6. Transverse section through portion of visceral mass showing 

 two muscular septa and intervening ovarian foUicle. 490: 1. 



Fig. 7. Young oocytes in an ovarian follicle. 520 : 1. 



Fig. 8. Developing egg as seen in transverse section of the visceral mass. 



Fig. 9. Degeneratlng egg from the mantle cavity cnt in transverse 

 section. 



Fig. 10. Cypris larva in transverse section. 



Fig. 11. Transverse section of the visceral mass showing the ecto- 

 dermal glands. 310 : 1. 



