PLATE 31). 



Imrs. 1, 3. Chaetodcrma scabra. X 33. Figs. 2, 4-6, 

 roljusla. X 33. Figs. 7-9, 11, 12. Chaetodprma japoniea. 



10, 13. 

 X 33. 



Cro.ss sections of Chaetodormn 



Througli lirain region. 



Tliioiigli railula. 



Same. Througli radula. 



Tiirough brain region. 



Tlirough suprarectal commissure. 



Througli postciior end of prothorax. 



Though outlet, on left, of coelonioduct. 



Through heart anil coelonioducts. 



Through suprai'cctal commissure. 



Through junction of pharynx and stomach. 



Through posterior end of prothorax. 



Through junction of pharj'nx and stomach. 



Through outlet, on left, of coelonioduct. 



