PLATE 10. 



Fig. 1. Chaetodcrma lucidum. Section through head at levql of radula. X 46. 



Fig. 2. Cross section through brain. 



Fig. 3. Section through posterior end of body at level of eoelomoduct outlets. 



Fig. 4. Junction of digestive gland and midgut or stomach. 



Fig. 5. Jimction of pharj-nx and stomach. 



Fig. 6. Section at level of suprarectal commissure. 



Fig. 7. Gastric epithelium, showing supposed intercellular bridges. 



Fig. 11. Anterior end. 



Fig. 8. Chaetoderma bacillum, entire animal. X 7. 



Fig. 9. Section through anterior end at level of radula. X 46. 



Fig. 10. Section at level of brain. 



Fig. 12. Section through junction of pro- and metathorax. 



Fig. 13. Portion of hypodermal layer. 



Fig. 14. Section at level of posterior end of heart. 



