OLIVA. 33 



170. selacea (f. 453), Duclos. — Oblongo-fusiformis, solida, 

 pallide fulva, fascia lata casrulea medio cincta, infra suturam 

 aurautio punctata ; spira conica, producta, anfractibus pla- 

 nulatis; columella callosa, tenuissime plicata, plicis calli 

 antici duabus distinctis ; apertura intus castaneo late uni- 

 fasciata. 



171. Esther (f. 392), Duclos. — 0. celacece forma similis, 

 rnagis ventricosa, solida, lactea, lineis fulvis tenuibus un- 

 dulatis infra suturam et supra balteum intensioribus no- 

 tata ; spira conica, sutura fusco maculata ; balteo supra 

 flavido, carina castanea ; columella callosa, postice laevigata, 

 calli antici plicis duabus, antico dense striato ; labio tenui. 

 Variat alba. — The figure of the coloured shell is copied from 

 Duclos. 0. columha, Duclos, is probably a variety of the 

 next species. 



172. petiolita (f. 393, 394, 418), Duclos.— Quam 0. Esther 

 angustior, fulva, lineis undnlatis subreticulata, supra bal- 

 teum et ad suturam maculata, infra suturam purpureo uni- 

 fasciata; balteo antice castaneo unifasciato. — Of a narrower 

 form and different colour from 0. Esther ; nevertheless, a 

 very closely allied species. 



173. tergina (f. 395-398), Duclos. — 0. pommies forma, 

 simdis, fulva, griseo aut fusco aut aurautio, lineis angulatis 

 inter areas parvas albas trigonas variegata, infra suturam et 

 supra balteum angulatim maculata ; columella valde callosa, 

 postice minute plicata, plicis calli antici duabus parvis, 

 postica, dentiformi ; spira callosa, varie tincta, frequenter 

 obtusissima. — A careful comparison of the present species 

 with 0. Esther and 0. petiolita will show how closely they 

 resemble each other. 



174. exigua (f. 399-401), Martini. — 0. tergince similis, 

 magis solida, haud tantum obliqua, fusco-grisescens, lineis 

 pallidis undulatis rufis flammulata et reticulata, infra sutu- 

 ram maculis lineatis rubris aut griseis late fasciata ; balteo 

 liueato et punctato ; columella antice rectiuscula. Var. 

 lactea, griseo nebulata. — This species has a more solid and 

 less oblique appearance than 0. tergina. It is less variegated 

 and more delicate in colour and markings, and the columella 

 does not present the same tooth-like projection on its 

 margin. 



r 



