802 CARBONIFEROUS AND SILURIAN FOSSILS FROM CENTRAL N.S.W., 



identify the following : — Spirifer duodecimcostata, McCoy ; a 

 Pterinea-iovm, the shell easily distinguished by its sharp radiating 

 tuberculated ridges, and new to N. S. Wales ; a Gervillea-Wke 

 bivalve, probably allied to some shells figured by Dana in the 

 " Geology of the U. S. Exploring Expedition." The greatest 

 interest naturally attaches itself to the Spirifer. In this colony S. 

 duodecimcostata seems a purely Carboniferous species. De Koninck 

 gives, on the authority of Clarke and McCoy, the following 

 localities for the same shell, Wollongong, Bombaderra Creek, 

 Stroud, and Adelong. It is also mentioned in Clarke's "Southern 

 Gold Fields " as a Carboniferous fossil. From an examination of 

 the rocks at New Babinda, I should incline to class the beds as 

 Devonian. But if, on the slender evidence we have, we assign 

 them to any horizon " the balance of evidence points rather to the 

 Carboniferous than Devonian" (Etheridge, MS. Nov. 1, 1886). 



The following directions will guide future investigators to the 

 locality. On the Parish Map of Babinda, County of Flinders, 

 find the point where the northern boundary of the parish cuts the 

 Nymagee and Nyngan surveyed road. Mark oflf one statute mile 

 due west from this point, The sandstone hills hereabout are 

 fossil if erous. Two miles north-west from this point fossils may be 

 readily detected in the sandstone ridges. 



(PuLPULLA Sandstones. 

 Devonian-^ 



(Nymagee and Sandy Creek Sandtones. 



To the north-west of Cobar there is an extensive development of 

 .sandstones, with massive conglomerates at their base, and minor 

 beds of conglomerates at higher levels. The only fossils known 

 are, casts of crinoidal stems, tracks of a Crustacean (?) on slabs 

 with ripple-marks. Crinoidal casts are also found in an altered 

 sandstone, or quartzite, eight miles to the west of Cobai-. The 

 sandstones at PulpuUa have furnished some beautiful examples of 

 ripple-mark on large slabs, on some of which are found the tracks of 

 a small animal probably a crustacean. It isobvious that these 



