PREFACE. 



tious, and one large species of Pleurofomaria, a genus abounding 

 in Palaeozoic and Mesozoic rocks, but of such excessive rarity in 

 Tertiary and recent times as to form an interesting addition to the 

 history of the distribution of the genus in time and space. 



The next plate illustrates a third new species of Tertiary 

 Trigo?iia, which has been collected by Mr. A. W. Howitt, P.M., 

 in Gijjjjsland, a genus unknown in Tertiary rocks until I annoimced 

 the discovery of the two other species figm-ed in our second 

 Decade. On this plate is also figm-ed a species of CucuUcea nearly 

 allied to the recent C. granulosa of China, very common in our 

 Tertiary deposits, although this conspicuous genus is not found 

 living on the coast of the colony. 



The three last plates continue the illustrations of our curious 

 extinct Tertiary species of Cyprcea. 



The fiitm-e Decades will continue the illustration of the fossil 

 collections made in the com-se of the Geological Svu'vey of the 

 Colony, which has now been resiuned under the care of the Secre- 

 tary for Mines, Mr. R. Brough Smyth, the permanent head of the 

 Mining Department. 



I 



Frederick McCoy. 

 10th February 1876. 



C 5] 



