PLATE 12. 



Chactoderma vadorum. Section through anterior end at level of radula. 



Section through one group of pharjTigeal glands. X 255. 



Spines from middle of body. X 146. 



Oblique section through metathorax. 



Section through middle of prothorax. 



Section through brain. 



Section at union of pharynx and stomach. 



Section through anterior end of metathorax. 



Section through pharynx slightly behind the radula. 



Section through junction of stomach and hver. 



Section through anterior end of pericardium. 



Same region as fig. 9 in another specimen. 



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



Section through union of pro- and metathorax. 



Section at level of suprarectal commissure. 



Gland cells near mid-ventral line of body in prcabdomcn. X 255. 



Same region as in fig. 1 of another specimen. 



