Tertiary.^ PALEONTOLOGY OF VICTORIA. \_Mollusca. 



One or two very old thick specimens show a spreading inner lip, 

 and a very faint indication in some lights of a crenulation on the 

 edge of the outer lip ; and the plaits are thicker, and in one case an 

 intermechate 5 th plait ajjpears. 



Connnon in the Tertiary clays of A* 14, parish of Moolap ; 

 a variety not uncommon in Oligocene Tertiary clays of Oi'phan 

 Asylum reserve, Fyans Ford, A* 28. Not uncommon in blue 

 Tertiary clays and lunestone, near Mount Martha. 



Var. a levior has the apical angle 65° to 70°, often a 4th small 

 columellar plait, and the spiral, transverse sulci become nearly or 

 quite ol)solete near the spinous shoulder, and sometimes on more 

 than half of the body whorl, as well as on the whorls of the 

 spire ; it is also a little stronger, but is certainly only a variety. 

 In clays and limestone, Mount Martha. 



Explanation of Figures. 



Plate VI. — Fig. 5, front view of average specimen, natural size. Fig. 5a, do., back view. 

 Fig. 54, outline of spire magnified. Fig. 6, outline of spire of V. cingulata (Sow.) from the 

 Barton clay of Hampshire, showing the regular acute spire for comparison with the Australian 

 Bpecies. The two uu-numbered figures are front and back views of younger specimens of the 

 V. anti-scalaris. 



Frederick McCoy. 



[ 28 ] 



