OLIVA. 39 



206. diodocus (f. 438), Ad. et Reeve. — Ovato-fusiformis, 

 seuiipellucida, pallidissinie fulva, maculis rubro-fuscis arcu- 

 atis triseriatira dispositis notata ; spira convexa, turbinate, 

 apice purpureo ; columella lasvi, oallo biplicato aut tripli- 

 cate acute tenninanti ; labio pellucido, antice subdilatato. 



207. teiticea (f. 439), Duclos-. — Elongato-subfusiformis, 

 pallida, maculis magnis quadratis aut trigonis fuscis in se- 

 riebus tribus dispositis ornata ; spira elongata, infra suturam 

 maculata; columella la3vi, antice callosa, complanata, uni- 

 plicata. — Three rows of large spots characterize this species. 



208. myriadina (f. 440), Duclos. — Minima, alba, pellucida, 

 elongato-subfusiformis, infra suturam opaca ; spira conica, 

 anfractibus rotundis ; balteo lato ; columella laavi, antice ad 

 terminum uniplicata ; labio crasso, acutimarginato. — The 

 length of the spire is very variable. 



209. milliacea (f. 441), Marred. — Quam 0. myriadina 

 magis ventricosa; anfractibus magis rotundatis, sutura, pro- 

 fundiori et latiori ; columella ad terminum biplicata. — Re- 

 sembles 0. myriadina, Duclos, but has two distinct folds at 

 the base, the whorls arc much rounder, and the suture wider 

 and deeper. 



Additional Species. 



210. atalina (f. 442), Duclos. — Ovato-fusiformis, alba, ma- 

 culis roseo-purpureis pallidis irregulariter dispositis picta; 

 spira depresso-conica, anfractibus prope suturam depressis ; 

 columella callosa, plicis tumidis lirata, calli antici plicis 

 quinque distinctis, albis. — Although this shell, together with 

 the next, have all the appearance of being varieties of 0. 

 episcopalis and 0. tricolor, I have not been able to connect 

 them. 



211. queksolina (f. 443), Duclos. — 0. episcopali simillima, 

 coloribus evanidis. — I can hardly doubt the identity of this 

 shell with 0. episcap>alis. — Ed. 



212. lutea (f. 444, 445), Marrat. — Oblongo-cylindracea, 

 fulva, lineis angulatim undulatis pallidis et maculis fuscis in 

 fasciis duabus dispositis notata; spira. depresso-conica ; co- 

 lumella fere omnino plicata, plicis distantibus baud promi- 



