PLATE 25. 



Sect ions of Chaet odernia at tenuat a . X 33 . 



Section through brain. 

 Section through radula. 



Section through junction of stomach and intestine. 

 Section through suprarectal commissure. 



Section through outlet of coelomoduct (pores omitted in figure). 

 Section through posterior end of prothorax. X 00. 

 Hypodermis, showing gland cells and attached fibres. X 555. 

 Section through heart. 

 Figs. 9, 10. Two successive sections through the subradular ganglion and connectives. X 135. 



