In Queensland, the upper beds are ferruginous, white and mottled sandy clays, the lower being coarse alternating grits and conglomerates; the extreme observed thickness has not exceeded 400 feet. A characteristic view of the upper "Desert Sandstone" beds is shown in Betts' Creek, on the Upper Flinders. Whether these are marine, lacustrine, or estuarine deposits, there is hardly sufficient evidence to show. What may be the value of this "Desert Sandstone" for free gold, is at present unsolved; but the very nature of its deposition seems to preclude the idea that that metal will be found in paying quantities, except where direct local abrasion of a rich auriferous veinstone has furnished the supply. MESOZOIC. Cretaceous.--As early as 1866 a suite of fossils was collected by Messrs. Sutherland and Carson, of Marathon station, Flinders River, and forwarded for determination to Professor McCoy, in Melbourne. They were never figured, but his manuscript names are as follows:-- _Reptilia._ Ichthyosaurus Australis. "M'Coy." Plesiosaurus Sutherlandi. Plesiosaurus macrospondylus. "M'Coy." _Cephalopoda._ Ammonites Sutherlandi. "M'Coy." Ammonites Flindersi. "M'Coy." Belemnitella diptycha. "M'Coy." Ancyloceras Flindersi. _Lamellibranchiata._ Inoceramus Carsoni. "M'Coy." Inoceramus Sutherlandi. "M'Coy" (identical with the English species I. Cuvieri). In company with Mr. Sutherland, who supplied McCoy with the before-mentioned materials, Mr. R. Daintree visited the Upper Flinders, and carefully collected the fossils from three localities, viz., Marathon station, Hughenden station, and Hughenden cattle station.