OLIVA. 75 



and fascicle spotted or streaked with chocolate or violet ; interior 

 of aperture orange-red. Length, l'5-2'25 inches. 



Indian Ocean, China, Philippines, Polynesia, Madagascar, Zanzibar. 



0. cruenta, Sol., and 0. emicator, Meusch., have priority over 

 0. guttata, but the latter name is so well known that it seems 

 inadvisable to change it. 0. mantichora, Duel. (fig. 67), is a 

 monstrous condition of this species, not uncommon among 

 Olives. 



0. RUFULA, Duclos. PI. 20, fig. 79. 



Fawn-colored, crossed diagonally or transversely by dark 

 chestnut bands formed by the coalescence of trigonal markings ; 

 aperture white within. Length, 1 inch. 



Philippines, Moluccas. 



0. TNFLATA, Lam. PL 19, figs. 68-70 ; PI. 20, figs. 71-76. 



Shell swollen, becoming gibbous in the middle in old specimens, 

 the spire partially sunken below the edge of the body-whorl, the 

 latter produced behind, with a heavy callous deposit ; outer lip 

 sometimes enormously thickened ; fasciole with a heavy callous 

 ridge, independent of the columellar plaits ; color white or 

 yellowish, more or less dotted, blotched or banded, or lightning- 

 streaked with brown-orange, chestnut, chocolate or bluish ash, 

 sometimes variegated with two or three colors at once, sometimes 

 almost or entirely covered with dark color, occasionally pure 

 white ; aperture white within. Length, 1-5-2 inches. 



Red Sea; Ceylon; E. Africa; Madagascar; Seychelles. 



The variability of this species in coloring is exceedingly great. 

 When old, the best characters are derived from the inflated form, 

 sunken spire, callous thickenings and columellar ridge; but less 

 developed specimens are so close to some of the succeeding 

 species that their distinction appears to be somewhat doubtful. 



0. lacertina, Quoy (figs. 75, 76), is a somewhat peculiarly 

 colored young shell of this species ; I have a similar specimen 

 before me. 



0. TIGRINA, Lam. PL 20, figs. 77, 78, 80. 



Light yellowish or ash-color, profusely marked with small blue- 

 gray spots, occasionally coalescing into short zigzags ; aperture 

 and columella white within. Length, 1-75-2-25 inches. 



Ceylon; Java; Philippines; East Africa. 



