68 Proceedings of the Royal Society of Victoria. 



Cerithiopsis sp. 

 Trochus, 2 species. 

 Minolia sp. 

 Hemitoma occlusa. 

 Cylichna sp. 

 Umbrella austrina. 

 Entails mautelli. 

 Corbula (? pixidata). 

 Myadora sp. 

 Mactra howchiniana. 

 Chione dimorphopliylla. ■ 

 Cytberea eburnea. 

 Chama lamellifera. 

 Crassatella dennanti. 

 Cardita delicatula. 

 Mytilicardia compta. 

 Leda vagans. 

 Barbatia celleporacea. 

 Barbatia simulans. 

 Peetunculus cainozoicus. 

 Pectuuciilus mc'coyii. 

 Limopsis belcheri. 

 Limopsis aurita. 

 Macrodon cainozoicus. 

 Modiolaria singularis. 



Dimya dissimilis. 

 Spondylus pseudoradula. 

 Lima jeffreysiana. 

 Lima bassii. 

 Pecten murrayanus. 

 Pecten foulclieri. 

 Pecten zitteli. 

 Ostrea (? hyotis). 

 Waldbeimia insolita. 

 Waldbeimia garibaldiana. 

 Waldbeima sp. 

 Terebratulina scoulari. 

 Cellepora fossa. 

 Cellepora, several species. 

 Salenaria, 2 species. 

 Eupatagus (?miirrayanus)cast. 

 Echinolampus sp. 

 Monostychia australis. 

 Leiocidaris australis. 

 Placotrochus deltoideus. 

 Siibeuotrochus excisus. 

 Isis sp. 

 Biloculiua 

 Orbulina sp. 



An inspection of this list shows at once that, just as with 

 the calciferous rock lower down the river, we are dealing 

 with an Eocene, and not a Miocene, deposit. The two sets 

 of strata are practically the same, the difference in the rocks 

 being mainly one of sedimentation. Mr. Howitt, F.G.S., the 

 well known and able geologist, in speaking of these deposits, 

 says, " apparent alternations of hard and soft material arise, 

 I believe, solely from variations of texture, due to local 

 causes."* The noticeable feature of the Wuk Wuk section, 

 is that it yields so many more species than the calciferous 

 rock close at hand, enabling us to determine with the utmost 

 confidence, the particular epoch to which the Bairnsdale 

 limestones belong. It Avill be remembered that on the 

 Murray cliffs, the friable strata, rich in mollusca, merge 

 gradually into the hard calciferous rock,-f- and that at Muddy 

 Creek, the lower beds, with their profusion of fossils, either 

 rest upon, or are bounded by, a similar vock.\ On the 

 Mitchell River, therefore, we have simply another illustra- 

 tion of the close connection, or rather identity, of the two 

 sets of strata. 



* Progress Report, No. II, Geological Survey of Victoria, 1874, p. 62. 

 t Professor Tate, Proc. Roy. Soc. S.A., Vol. VII, p. 39. 

 X Proc. Roy. Soc. S.A., Vol. XI, p. 34. 



