PREFACE. 



The seventh plate continues our illustrations of the extinct 

 Oligocene Tertiary Volutes. 



The eighth plate represents a fine species of Spondjjlus common 

 in our Miocene Tertiary strata, closely representing the European 

 Tertiaiy S. gaderopus, but quite unlike any shell living in our seas. 



The ninth plate is of high interest, as exhibiting the form and 

 size of the foliage of a species of Eucalyptus found abundantly in 

 the strata of Pliocene Tertiary age in the gold mines of the Haddon 

 Lead, proving that at this late geological period the forest vegeta- 

 tion was geuerically identical and specifically differing only in the 

 smallest characters from the so-called gum trees now growing in 

 the district. 



The last plate is equally interesting, as showing that the trees 

 and shrubs most common in our Miocene Tertiary strata were 

 totally different in type from the prevalent vegetation of the countiy 

 now, but agreed closely with the most characteristic Lauraceous 

 Plants of the European Miocene Tertiary rocks. 



The future Decades will continue the illustration of the fossil 

 collections made in the course of the Geological Survey of the 

 colony. 



Frederick IMcCoy. 

 26th October 1876. 



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