OLIVA. 



29 



143. fimbriata (f.355), Nccve.—O. muticcB simillima, parva, 

 angusta, tenuior, medio purpurea; spira breviori. — I can see 

 no special reason for separating this from 0. mutica, Say. 

 {Mar.) 



149. eufifasciata (f. 449), Reeve. — 0. mutica similis, post 

 medium turnidiuscula, medio, ad suturam, supra balteum 

 medioque baltei castaneo fasciata. — Chiefly distinguished by 

 the chestnut bands from 0. mutica, Say. 



150. pusilla (f. 356-858), Marrat. — Parva, ovato-fusiformis, 

 fusca vel grisea,uonnunquam albo fasciata; spira cornea, obtu- 

 siuscula, balteo concolore ; columella arcuata, callosa, incras- 

 sata, callo antico valide quadriplicate ; apertura intus pallida ; 

 labio abraso, margine acuto; operculo semiovato. — In 0. 

 mutica the plaits are close, on an arched callus ; in 0. fim- 

 briata the plaits arc wanting, but the callus is present; in 

 0. zonalis there is only a single fold at the base, but four 

 folds at the upper part of the callus. 



151. mutica (f. 359-361 and 465-467), Say. — Breviter 

 conico-fusiformis, grisea aut fulva, castaneo fasciata; spira 

 conica, callosa, sutura rubro-lineata ; balteo diviso, antice 

 castaneo unifasciato; columella alba, callosa, ad marginem 

 aperturas distanter biden'ata; plicis calli antici duabus tor- 

 tuosis ; apertura parva, intus griseo-fusca ; labio prope su- 

 turam incrassato, maririne tenui. — The ends of the two small 

 folds project in the form of an anterior and posterior tooth 

 on the margin of the columella. 



Of the fallowing Species constituting the Genus Olivella, 

 Swainson, many are hwicn to have opercula. 



152. volutella (f. 362-367), Lamk. — Lanceolate subfusi- 

 forinis, recta, solida, fusco-purpurea aut pallide grisea aut 

 fulva aut alba unimaculata, vel medio grisea, lineis undulatis 

 longitudinalibus nebulata ; spira, conica, pyramidata, anfrac- 

 tibus planulatis, sutura fusco lineata; balteo concolore, vel 

 albo vel fusco maculato; columella callosa, postice fusco uni- 

 maculata, plicis calli antici numerosis subtransversis ; aper- 

 tura concolori ; labio tenui, luteo ; operculo tenui, elongato, 

 utrinque rotundato. — Solid, straight, lanceolate, and gene- 

 rally of a uniform colour. 



