PLATE 9. 



Fig. 1. Chaetoderma caudatum, entire animal. X 8. 



Fig. 2. Head region of same specimen. X 12. 



Fig. 3. Side view of another specimen. X 12. 



Fig. 4. Anterior view of same animal as fig. 1. X 12. 



Fig. 5. Section at level of radula. X 88. 



Fig. 6. Section through pericardium and coelomoducts. 



Fig. 7. Section at level of external coelomoduct openings. 



Fig. 8. Section at level of brain. 



Fig. 9. Hypodermis of prothorax. X 360. 



Fig. 10. Junction of stomach and liver. 



Fig. 11. Spines from midsection of body. X 190. 



Fig. 14. Section through outlets of pericardium into coelomoducts. 



Fig. 12. Two specimens of Chaetoderma luoidum. X 4. 



Fig. 13. Section through a pharyngeal gland. X 330. 



Fig. 15. Spines. X 146. 



Fig. 16. Cross section of metathorax. X 46. 



Fig. 17. Section through dorso-terminal sensory groove. X 190. 



Fig. 18. Cross section at junction of pro- and metathorax. 



