552 NOTES ON THE NATIVE FLORA OF NEW SOUTH WALES, Vlll., 



Spotted Gum is not seen, except for a few trees just beyond 

 Wollongong, until the neighbourhood of Nowra is approached, 

 after whicli it becomes common, and occurs at many points along 

 the Milton road, such as at The Falls, and beyond Tomerong, 

 where the geological formation is of Permo-Carboniferous 

 age. It is absent, however, from the igneous formation of 

 Milton, but reappears to the south immediately the sedi- 

 mentary rocks are reached, being plentiful towards Bateman's 

 Bay and also at Wagonga, where some of the very finest 

 specimens of this species may be found It extends into 

 the north-eastern part of Victoria, but is only very sparsely 

 represented in that State. On parts of the North Coast of 

 New South Wales it is a common tree, and occurs in the 

 Maitland-Singleton district on the Permo-Carboniferous for- 

 mation in company with E. crehra, the Narrow-leaved Iron- 

 bark. It extends to within about twenty miles of the Great 

 Dividing Range at Crooked Creek, on the Tenterfield-Casino 

 road. E. maculata is decidedly rare, however, in the Sydney 

 district, and generally speaking appears to avoid the Hawkes- 

 bury Sandstone formation. There are a few exceptions to 

 this discrimination, one being its occurrence on the sandstone 

 just near the monoclinal fold from The Oaks to the western 

 side of Mulgoa, while others are at Newport, and on the 

 Appin road, about five miles from Campbelltown. At New- 

 port, the Spotted Gum is growing on the rocks which form a 

 remnant of the base of the Hawkesbury Sandstone immedi- 

 ately overlying the Narrabeen Shales : while at The Oaks, and 

 near Campbelltown, it occurs on the top of fairly thick beds 

 of Hawkesbury Sandstone, from which the overlying Wiana- 

 matta Shale is, in places, only just barely removed. Obser- 

 vations in regard to the distribution of this species tend to 

 show that it does not seek either a highly siliceous sandstone, 

 or a shale or slate of basic origin, but flourishes best where 

 there is a combination of the two : and while it usually avoids 

 the Hawkesbury Sandstone areas, as too siliceous, it is also 

 absent from the deepest portions of the Wianamatta Shale. 



