EXPLANATION OF PLATE V. 



Fig. 9. B. kershawi, Brazier, from the author's type in the Australian 

 Museum. 



„ 10. Apex of shell of P. atomata to show sculpture of embryonic 

 shell, magnified. 



„ 11. Jaw of ditto, magnified. 



„ 12. Egg of Pedinogyra cunninghami, natural size. 



„ 13. Genitalia of P. atomata. 



