Palaeontology of the Older Tertiary. 337 



EXPLANATION OF PLATES. 



Plate XVTTT. 



FifT. ]. — Bankivia howitti, sp. nov. Natural size. 



,, 2. — Clavella bulbodes, Tate. Young specimen, natural 

 size. 



„ 3. — -Clavella bulbodes, Tate. Adult specimen, about one- 

 half natural size. 



„ 4. — Clavella platystropha, sp. nov. Adult specimen, about 

 one-half natural size. 



,, 5. — Clavella platvT^tropha, sp. nov. Young specimen, na- 

 tural size. 



,, 6. — Collonia otwayensis, sp. nov. Natural size. 



„ 7. — Collonia otwayensis, sp. nov. Enlarged about four 

 diameters. 



,, 8. — Collonia geelongensis, sp. nov. Natural size. 



„ 9. — Collonia geelongensis, sp. nov. Enlarged about ff)ur 

 diameters. 



,, 10. — Columbella balcombensi'S, sp. nov. Natural size. 



,, 11. — Columbella balcombensis, sp. nov. Enlarged. 



., 12. — Columbella approximans, sp. nov. Natural size. 



,, 1.3. — Columbella approximans, sp. nov. Enlarged. 



Pl.\ti.: XIX. 



Fig. 1.^ — Pleurotoma sehvyni, sp. nov. 



2. — Pleurotoma selw^-ni. var. laevis, var. nov. 



3. — Pleurotoma granti, sj). nov. 



4. — Turl)o hamiltonensis, sp. nov. 



5.- — Cantharidus serratulus, sp. nov. With spiral threads 



of unequal strength. 

 6. — Cantharidtis serratulus, sp. nov. 

 7. — Astele luillegranosa, sp. nov. Umbilical aspect. 

 8. — Astele millegi'anosa, sp. nov. Front view. 

 9. — Eutrochus f(jntinaiis, sp. nov. 

 10. — Pleurton)a murrayana, sp. n^v. 

 11. — Apiotoma bassi, sp. nov. 

 All the figures on the above plate are natural size. 



