PLAID, 23. 
All shells 1.5 times natural size. 
Figs. 1-13. P. nodosa composita Cr., Punaruu Valley. 
Figs. 1-4. Color-class pallidior Pils. 
Figs. 5-11. Color-class trilineata Pease. 
Fig. 12. Color-class concrescens Cr. 
Fig. 13. Color-class nodosa Pf. 
Figs. 14-36. P. nodosa leva Pils., Maruapoo Valley. 
Figs. 14-16. Dextral, unbanded. 
Figs. 17-19. Dextral, banded. 
Figs. 20-28. Sinistral, unbanded. 
Figs. 29-36. Sinistral, banded. 
