156 Proceedings of the Royal Society of Victoria. 



triple series was thus distinguished, which was stated to show 

 sufficient palreontological differences to justify tlie application of 

 the names Upper, Middle, and Lower Miocene (12). 



Subsequently Messrs. Tate and Dennant stated (6) that the 

 polyzoal limestone merged into the upper series of clays, sands > 

 and hard limestone bands, and that no palajontological distinction 

 other than that caused by change of sediment existed. In their 

 last paper (2) they have admitted that there are two zones at 

 Spring Creek, but still I'efer the whole of the series to one epoch, 

 namely, eocene. 



The result of our examination of the section is to confirm 

 the observations of Messrs. Tate and Dennant on these three 

 points. Consequently, instead of the three subdivisions of the 

 survey, we have only two, as their two upper divisions merge 

 laterally. 



Hitherto most of the collecting has been done in the lower 

 zone, with the exception of echinoderms, brachiopods and a few 

 pectens, which have been gathered from the polyzoal limestone, 

 and from what Messrs. Tate and Dennant term the echinoderm 

 rock. The molluscan lists and the calculations deduced from 

 them have been founded on the material contained in the beds at 

 or about the level of those of Bird Rock. 



On our last two visits to Spring Creek we carefully 

 searclied the beds above the echinoderm rock at Fishei'man's 

 Steps and along the accessible portions of the cliffs towards 

 Rocky Point, where similar beds overlie the limestones. As 

 already pointed out by Messrs. Tate and Dennant, the most 

 interesting point about the beds is the occurrence of a large 

 percentage of forms not hitherto recorded from the section. 

 Many of these are new, others have only been recorded from 

 Table Cape, while some are common species at others of our 

 eocene sections, which we have grouped with Lower ]Muddy 

 Creek. It is these last that are specially of interest in consider- 

 ing the question of the general sequence of the Victorian beds. 

 If the Spring Creek series occupied an intermediate position 

 between the Lower Muddy Creek series and the miocene, we 

 should expect the fauna of the higher of the two zones at Spring 

 Creek to be still more closely allied to the miocene, and less so to 

 that of the Lower Muddy Creek series than is that of the lower 



