4O2 LOUIS MAX HICKERNELL. 



PLATE III. 



FIG. 7. Section through brain and posterior part of pharynx of normal ex- 

 tended animal. Zeiss. Oc. 6, Obj. 2 mm. 



FIG. 8. Section just posterior to the mastax and through salivary glands and 

 oesophagus. Zeiss Oc. 6, Obj. 2 mm. 



FIG. 9. Section through mid-body region. Leitz Oc. 4, Obj. 2 mm. 



FIG. 10. Section through mid-body region of animal containing egg. Zeiss 

 Oc. 6, Obj. 2 mm. 



FIG. ii. Section through point of juncture of stomach-intestine and "blasen- 

 darm." Zeiss Oc. 6, Obj. 2 mm. 



FIG. 12. Section through contractile bladder and foot-glands. Zeiss Oc. 6, 

 Obj. 2 mm. 



