216 



by its constantly changing dip. The fossils are exceedingly 

 scarce in the cliffs, but the following list, though a very short 

 one, sufficiently indicates their horizon :—Chthamahis sp., 

 ? Voluta sp. (casts), Pecten FoidcJieri, var., P. Gcoiibierensis, 

 Walhheimia insolita, Magasella Woodsiana, Lovenia Forbesi 

 (numerous), spines of Cidaris sp., and bryozoan remains. 



6. MORNIXGTON AXD CHELTENHAM. 



In the Prodromus of the Palaeontology of Victoria, the first 

 of these two deposits is correctly placed at the base of the 

 tertiary series, but to the second a most unwarrantable position 

 is assigned, viz., in the Pliocene division. The number of species 

 from both has been greatly increased recently, fully 400 being 

 now recorded from Mornington, and 126 from the less prolific 

 beds at Cheltenham. As it is intended to describe them in 

 detail in a succeeding paper, we will merely say at present that 

 the former is certainly Eocene, and that the latter belongs, 

 probably, to a higher level of the same group. 



MIOCENE. 



The beds previously described are : — Muddy Creek (upper 

 beds),* Jemmy's Point,! Portland and Glenelg River, t 



The number of species now definitely traced to the Upper 

 deposit at Muddy Creek is 205, but as a large proj)ortion of 

 these are still undescribed, its classification, strictly on the per- 

 centage system, must be postponed. Thirteen of the species, or 

 rather more than 6 per cent., are certainly recent, and it is 

 probable that this number will be at least doubled by a critical 

 examination of all the fossils. Twenty-seven species, or 13 per 

 cent., pass down into the underlying Eocene zone ; several of 

 these are prevailing forms, spread throughout the whole series. 

 In its general facies, the fauna of the upper zone at Muddy 

 Creek bears a striking resemblance to that in the Jemmy's Point 

 deposit, though in the latter the jDercentage of living species is 

 much higher, reaching fully 16 per cent. 



In summarising his examination of the Foraminifera of Muddy 

 Creek, Mr. W. Howchin, F.G.S., makes the following remarks 

 upon the distinction between the upper and lower zones at Muddy 

 Creek : — " The stratigraphical distinction between the two beds 

 of the section concerned is sufficiently marked from the fact that 

 the Foraminifera common to both only amount to 28 per cent, of 

 the whole. There is also a marked change in the general facies 

 of the rhizopodal fauna as we pass from the lower to the upper 



* Roy. Soc. of S. Austr. , vol. XI. 



tEoy. Soc. of Vic, vol. III., 1891. 



J Trans. Austr. Assoc. Adv. of Science, Melbourne, 1890. 



