PLATE 27. 



Figs. 1,2,4-11. Cross sections of Chaetodernia montereyen.sis. (X 40.) Fig. 3. C. uanula. 



Fig. 1. Through brain region. 



Fig. 2. Through heart and coelomoducts. 



Fig. 3. Through junction of pharynx and stomach. 



Fig. 4. Througli radula. 



Fig. 5. Through labio-buccal gangha and gUmds entering pharjnx. 



Fig. 6. Tlii-ough heart and coelomoducts. 



Fig. 7. Dorso-terniinal sense organ. 



Fig. 8. Through suprarectal commissure. 



Fig. 9. Through outlet, on left, of coelomoduct. 



Fig. 10. Tlirough junction of pharynx and stomach. 



Fig. 11. Through brain and anterior buccal plate of small specimen. 



