ALANIS, 22. 
All shells 1.5 times natural size. 
Figs. 1-4. P. filosa Pf., Pirai Valley. Color-class D. 
Figs. 5-8. P. filosa Pf., Pirai Valley. Color-class E. 
Figs. 9-36. P. nodosa composita Cr., Taapuna Valley. 
Figs 9, 10. Dextral, color-class pallidior Pils. [I]. 
Figs. 11-21. Dextral, color-class trilineata Pease [II]. 
Figs. 22-25. Dextral, color-class concrescens Cr. [III]. 
Figs. 26-30. Dextral, color-class nodosa Pf. [IV]. 
Fig. 31. Sinistral, color-class pallidior Pils. [I]. 
Figs. 32, 33. Sinistral, color-class trilineata Pease [II]. 
Figs. 34, 35. Sinistral, color-class nodosa Pf. [IV]. 
Fig. 36. Sinistral, adolescent. 
