Tertiary.-] PALEONTOLOGY OF VICTORIA. IMollusca. 



of large size in the blue clays of Muddy Creek, near Grange Burn, 

 5 miles from Hamilton ; very rare and of small size in blue clay 

 (A" 14), outer Geelong harbor ; very rare, of moderate size, in yellow 

 marls (A'' 15), Corio Bay. 



Explanation of Figukes. 



Plates XXVIII. and XXIX. — Fig. 3, arerage specimen, natural size, viewed from below 

 Fig. 3o, same specimen, viewed from above. Fig. 3i, same specimen, viewed from behind. 

 Fig. 3c, portion of dorsal sulcus of same specimen, magnified. 



Frederick McCoy. 



[38] 



