96 



AsTRALiuM (calcae) ornatissimum. Shell very solid, 

 rounded obliquely, and globosely conical, whorls five, rounded 

 and ornamented below with a marginal rib of close granula-' 

 tions ; above this a very fine line of granules, above this a pro- 

 jecting conspicuous spiral line of lamellar imbricating 

 spinous folds, and crowned above by a spiral line of coarse 

 round nodules ; aperture circular, outer lip with an exterior 

 angle and canal ; columella curved, scarcely flattened ; base 

 concave above with four spiral granular ribs. Alt. 17, 

 diam. 13. 



Delphinula tbtragonostoma. n.s. Shell small, obliquely 

 turbinate, latticed, whorls four, swollen, with three keels and 

 8-9 spiral lirae, which are united to each other by small close 

 diagonal riblets, making complete lattice-work all over the 

 test ; apex obtuse, depressed ; aperture I'ound, outer lip 

 quadrangulate, with a distinct channel at eaeh angle ; inner 

 lip reflected over the umbilicus, on the outside of which is a 

 salient conspicuous marginal rib which joins the aperture at 

 the anterior angle ; base convex and latticed. Long. 2 ; lat. 

 31 mil. 



This very small Delphinula has some relation with our 

 latticed Tasmanian Liotias, but is very distinct in every other 

 way. 



ZizYPHiNUS BLAXLANDii. U.S. Shell Small, conical, stained 

 purplish in colour, spirally ribbed and transversely diagonally 

 finely striate ; whorls 7, flattened above aud surmounted by 

 a broad canaliculate spiral groove, which is diagonally finely 

 striate ; spiral ribs, four on each whorl, and separated from 

 each other by equal grooves, which have 3-4 spiral lirae and 

 diagonal striae ; penultimate whorls very finely coronate 

 above with almost imperceptible elevation of the margin, 

 these become more distinct on the next whorl above, and then 

 are regular granulations on the two next ; the two apical 

 whorls are smooth ; on the penultimate whorl and base the 

 transverse striae are raised, but faint, with a tendency to be 

 in pairs ; on the antipenultimate they are wrinkled and dis- 

 tinct ; mouth sub-quadrate ; outer lip thin ; columella with a 

 faint umbilicus behind, margined by a thick spiral rib. Long. 

 5, lat. 4, mil. Named after one of the first explorers who 

 crossed the blue mountains. This fossil is not allied to any 

 existing species in these seas, though slightly resembling a 

 Philippine form. 



LioTiA LAMELLOSA. u. s. Shell Small, orbicular, sub- 

 discoid, apex flattened, and depressed, four to five longitu- 

 dinal keels, which are not very prominent, and equally, dis- 

 tinctly lamellosely costate with overlapping undulating ribs, 

 between which the whole shell is closely and finely striate, 



