PLATE 11. 
All shells natural size. 
Figs. 1-11. P. salifana new species. 
Figs. 1-5. Various color types. 
Figs. 6, 7. Decorticated specimens. 
Figs. 8, 9. Adolescent shells. 
Figs. 10, 11. Embryonic shells. 
Figs. 12-19. P. fragilis Férussac. 
Figs. 12-16. Specimens of different colors and sizes. 
Figs. 17, 18. Young adolescent shells. 
Fig. 19. Embryonic shell. 
Figs. 20-26. P. radiolata Pfeiffer. 
Figs. 20-26. 
Figs. 27-32. 
Figs. 33-36. 
Figs. 37-44. 
Figs. 45-48. 
Figs. 49-56 
Color-class pallida. 
Color-class flavea. 
Color-class fulva. 
Color-class strigata. 
Color-order strigata-helix. 
Color-class bicestata. 
Fig. 57. Embryo pallida from flavea adult. 
Fig. 58. Embryo flavea from pallida adult. 
Fig. 59. Embryo fulva from fulva adult. 
Figs. 60, 61. Embryo strigata from strigata adults. 
Fig. 62. Embryo strigata-helix from strigata-helix adult. 
Figs. 63, 64. Embryo bicestata from bicestata adults. 
