EXPLANATION OF PLATE XXII. 



Ptychodera hedleyi, sp. nov. 



Fig. 11. Transverse section through the anterior portion of the genital 

 region to show the thick walled intestinal diverticulum (idv.' 

 x24. 



12. Transverse section through the middle of the genital region. 

 The genital cushions (gnc.) are in this section more approxi- 

 mated than is normal, x 24. 



[For Reference Letters see pages 345-6.] 



