150 



many European weeds which do not occur in the intervening 

 countries, and they have for a certainty not been introduced. 

 A Pleurotoviaria has been described fossil by Prof. M'Coy as 

 from the tertiary beds of Geelong. 



No. 51. Parthenia TASMANiCA. U.S. P.t. minuta tumide 2)}/ramidali 

 alba, subumbilicata ; vertice nudeoso parvo, verticaliter sito, siib-tumente, 

 an/r. 6, conspicue tricarinatis, planatis, et longitml. temiissime striatis ; 

 earinis elevatis roitindatis ; suturis jmictione 2 carin. point occultis ideoque 

 carinis infra et supra suturas quasi ex una carina lata confectis ; basi vix 

 convexa, lirata ; apertura pyriformi, integra, labio reflexo. axi plica 

 distmcte munita. Long. \\, lat. vix \ mil. 



A minute tricarinate shell, dredged in Long Bay by the 

 Eev. H. D. Atkinson. The upper and lower keels of each 

 whorl are so closely united as to appear like one broad one in 

 which the suture is concealed, the mouth is entire, the inner 

 lip reflexed and furnished with a very distinct tooth. 



No. 52. AcLis TRiSTRiATA. n.s. A.t. parva, elongata, p)yramidali, 

 turritissima, alba, opaca, lavi, tux nitente ; anfr. 12, conspicue tri-striatis, 

 striis latis ; medio tenuissime concinne long, liratis ; sutura impressa, lira 

 parva instructa ; nucleo, minuto, Icevi ; basi convexa ; ajjertura integra 

 pyriformi, postice attenuata, labro tenui, labio reflexo. Long. 10, lat. 2, 

 mil. North West Coast. W. F. Petterd. 



Shell small, elongate, pyramidal, very much turretted, 

 white, opaque, smooth, scarcely shining ; whorls 12, con- 

 spicuously tristriate with broad striae, slenderly and neatly 

 longitudinally lirate in the middle of the whorls, suture im- 

 pressed, furnished with a small raised line ; nucleus minute, 

 smooth ; base convex, aperture entire, pyriform, attenuate 

 posteriorly, outer lip thin, inner lip reflected. 



No. 53. Syrnola michaeli. n.s. S.t. parva, aciculata, turritissima, 

 Icevi, nitente, alba, 2fasciis castaneis varie interruptis pallidissime zonata ; 

 anfr. 12, planatis; apice? (decoll.) apertura semilunata ; labro tenui, 

 producto ; labio reflexo, umbilico simulante, plica tuberctdoso. Long. 8, 

 lat. 2 mil. 



Shell small, acicular, highly turretted, smooth, shining, 

 white, zoned with two variously interrupted very pale chest- 

 nut bands ; whorls 12, flattened ; apex ? decollated, aperture 

 semilunate, outer lip thin, produced, lip reflected into a false 

 umbilicus, plait tuberculose. North Coast. W. F. Petterd. 



No. 54. Elusa bifasciata. n.s. E.t. subulata, turrita, tenui, sub- 

 pellucida, alba, castanea late zonata, zona 2 lineis fulvis marginata, 

 sutura impressa, apnce Icevi, rotundato ; anfr. 12, convexis, creberrime 

 costatis (idt. anfr. 26), costis validis rotundatis, Icevibus, nitenfibus, in- 

 terstitiis cequalibus, intus in spira videtur temdter lirata ; apertura integra, 

 pyriformi, ■ labio reflexo, obsolete plicato, labro antice tantillum producto, 

 intus Icevi, basi convexa, striata. Long. 7, lat. 1^. Blackman's Bay. 

 Rare. W. F. Petterd. 



The genus Elusa was established by Adams for turretted 

 subulate shells with ribs, a plait on the columella and often 

 lirate within. In this species the three last whorls are not 



