74 OLIVA. 



O. 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. 



0. SPLENDIDULA, Sowb. PI. 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. 

 O. PERUVIANA, Lam. PI. 18, figs. 55 T 58. 



Shell thick, gibbous, with sometimes a slightly angulated 

 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 aod Chili. 



O. EPISCOPALIS, Lam. PL 18, figs. 59, 60 ; PL 19 r 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 0. 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. epitcopalis. 



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 



