PLATE 12. 



Chaetoderma vadonim. Section through anterior end at level of radula. 



Section through one group of pharjiigeal glands. X 255. 



Spines from middle of body. X 146. 



Obhque section through metathorax. 



Section through middle of prothorax. 



Section through brain. 



Section at union of i)harynx and stomach. 



Section through anterior end of metathorax. 



Section through pharj-nx slightly behind the radula. 



Section through junction of stomach and liver. 



Section through anterior end of pericardium. 



Same region as fig. 9 in another specimen. 



Section at level of openings of gut and coelomoduct into the cloacal chamber. 



Section through union of pro- and metathorax. 



Section at level of suprarectal commissure. 



Gland cells near mid-ventral hne of body in preabdomen. X 255. 



Same region as in fig. 1 of another specimen. 



