74 OLIVA. 



0. PORPHYRIA, Linn. PL 18, fig. 53. 



Flesh-color, angularly marked with some large, and many 

 small, crowded, deep chestnut lines ; fasciole tinged with violet, 

 with chestnut maculations ; interior of aperture and columella 



yellowish flesh-color. Length, 4 inches. 



Panama to Mazatlan. 



Sometimes very faintly, broadly two- or three-banded with 

 bluish ash. 



O. SPLENDIDULA, Sowb. PL 18, fig. 54. 



Flesh-color, with two broad, interrupted brown bands composed 

 of triangular markings and reticulations, the intermediate surface 

 covered with fainter maculations and spots ; base tinged with 

 violet, interior yellowish flesh-color. Length, 2 inches. 



Panama. 

 0. PERUVIANA, Lam. PL 18, figs. 55-58. 



Shell thick, gibbous, with sometimes a slightly an^ulated 

 shoulder; flesh-color, covered with numerous chestnut spots, 

 disposed to coalesce into close zigzag longitudinal markings, 

 or into larger and more distant zigzags ; sometimes the markings 

 are entirely absent, in others the entire surface is more or less 



covered with chestnut. Length, 2 inches. 



Peru and Chili. 



0. EPISCOPALIS, Lam. PL 18, figs. 59, 60 ; PL 19, figs. 61-63. 



White, with chestnut spots and maculations having ash-colored 

 shadings, and sometimes indistinct ashy bands ; interior of 

 aperture deep violet. Length, 1*5-2*25 inches. 



Indian Ocean ; N. Australia ; N. Caledonia to Central Pacific. 



Constantly distinguished by its violet interior. 0. lugubris, 

 Lam. (fig. 60), is a dark-colored variety ; 0. quersolina (fig. 59), 

 and O.-atalina, Duclos (fig. 62), are pale or faded specimens. 

 0. fulva, Marrat (fig. 63), is pink with light red spots and 

 indistinct bands, roseate within the aperture : I agree with Dr. 

 WeinkaufF that it is probably only a variation of 0. epixcopali*. 



O. GUTTATA, Lam. PL 19, figs. 64-67. 



Cream- to flesh-color, with large or small bluish ash-colored 

 spots varying to chestnut or shaded with both colors ; suture 



