Tertiaries in the Neighbourhood of Melbourne. 221 



Summary. 



Zoantharia ----- 3 



Echinodermata - - - 1 



Annelida ... 1 



Brachiopoda - - 3 



Lamellibranchiata - - 15 



Gastropoda - - 42 



Scaphopoda - - 3 



Pteropoda - - - 3 



Pisces - - - 1 



72 



The Geological Structure of the District. 



Having now considered the fossiliferous localities of the 

 Tertiary Rocks we shall make a few remarks on the structure 

 of the area. 



Upper Silurian. 



The bed rock wherever exposed is Upper Silurian. There has 

 been no attempt to work out in the field the stratigraphical 

 relationships of the different fossiliferous outcrops of these rocks, 

 and very little, comparatively, has been published on the organic 

 remains. There is evidence, as will be shown below, that these 

 rocks are intruded by granitoid rocks, and that extensive outcrops 

 of the latter formerly occurred. 



The Loiver Leaf Beds, and Brown- Coals. 



An outcrop of these from under the Older Volcanic Rock at 

 North Melbourne has been noticed above, though, so far, we have 

 found no fossils in it. Brough Smyth records another outcrop at 

 Footscray, and the beds are indicated as occurring near the 

 Industrial Schools in Royal Park. 



These beds thicken very much to the south-west where they 

 are represented by the brown-coal deposits of Newport and 

 Altona Bay. The age indicated for the northern members of 

 these beds on the quarter-sheet is Pliocene. Brough Smyth (4) 

 gave reasons for considering them to be Miocene, and his classiti- 



