6 ON SOME TERTIARY FOSSILS, 



spiral canal. The ornamentation of the flat whorl, is confined to 

 numerous small close sloping ribs, which are divided into many 

 granules. The divisions between which correspond so as to give 

 rise to spiral grooves. The upper granules on each rib are 

 rather larger than the rest, giving the suture a somewhat coronate 

 appearance. 



Trlforis wilkinsoxi. var. psila. PI. 1, fig. 10. 



Testa fere minuta, turritissima, solidiuscula nitente, apice acuto ; 

 anfr. 17, eonvexis, conspicue 4 carinatis, crebre eostatis, earinis supra 

 cost, transeimtibus et ibi nodosis, costis in 3 ultimis anfr. antice evanidis 

 ita ut 3 earinis sint Icevihus, sutura late canieulata et funiculo minuto 

 insignito, basi lirata, canali brevi, obliquo, apertura ovata. Long. 8£, 

 lat. 2. 



This small fossil, which is almost minute in size, is very- 

 similar to T. Wilkinsoni, nobis, except that the longitudinal costfe 

 disappear in the three last whirls towards the base, and the base 

 is Urate not radiately costate. Still I do not think it more than 

 a variety. 



Triforis planata. PI. 1, fig. 12. 

 Testa parva, elongata, turrita, pyramidata, nitente; anfr. 13, 

 planatis, oblique eostatis, basim versus duobus lir is spiralibus insignit is, 

 superiori granulosa, granulis cum costis concurrentibus, inferiori supra 

 suturam Icevi, rotundata, basi, concava, unicarinata, radiatim. corrugata ; 

 apertura quadrata, labro tenui, cum canali continuo ; labio reflexo, 

 canali angusto, brevi, recurvo, pene clauso, apice obtuso, nucleo reverso, 

 costis crebris, fult. anf 24 J rotundatis, parum elevatis. Alt. 9, lat. 2. 



This fossil is mainly distinguished by its acicular form, and its 

 numerous close oblique ribs which are divided at the base by a 

 groove. The suture is covered by a smooth rounded raised line. 

 The aperture is quadrate and the outer lip thin , continuous with 

 the short curved canal, which is almost closed. The base is 

 concave, unicarinate and radiately rugose. It differs from the 

 described fossils of the genus in Australia in the lower groove. 



