PLATE 14. 
All shells natural size. 
Figs. 1-57. P. gibba Férussac, from Saipan. 
Figs. 1-10. Color-class unicolor, shells from Sadog Tase, excepting 
those of figs. 6 and 8, from Fanaganam. 
Figs. 11-20. Color-class bicolor, shells from Fanaganam, excepting 
those of figs. 12, 13, and 17, from Garapan. 
Figs. 21-30. Color-class mitella, shells from Chalankiya. 
Figs. 31, 34, 36, 37. Color-order mitella-rubra, Chalankiya. 
Figs. 32, 33. Color-order mitella-rubra, Puntan muchut. 
Fig. 35. Color-order mitella-rubra, Astaman. 
Figs. 38-40. Color-order castanea-rubescens, Puntan Flores. 
Figs. 41, 44, 47, 48. Color-order castanea-rubescens, Sadog Tase. 
Figs. 42, 43, 45, 46. Color-order castanea-rubescens, Garapan. 
Fig. 49. Color-order castanea-rubescens, Fanaganam. 
Figs. 50, 52, 53,5 57: Color-order castanea-purpurescens Fanaganam. 
Figs. SI, 54-56. Color-order castanea-purpurescens, Garapan. 
