PLATE 10. 



Chaetoderma lucidum. Section tlirough head at level of radula. X 46. 



Cross section through brain. 



Section through posterior end of body at level of coelomoduct outlets. 



Junction of digestive gland and midgut or stomach. 



Junction of pharynx and stomach. 



Section at level of suprarectal commissure. 



Gastric epithelium, showing supposed intercellular bridges. 



Anterior end. 



Chaetoderma bacillum, entire animal. X 7. 



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



Section at level of brain. 



Section through junction of pro- and metathorax. 



Portion of hypodermal layer. 



Section at level of posterior end of heart. 



